GCSE Higher Maths Exam Walkthrough with

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Tom Rocks Maths

Tom Rocks Maths

Күн бұрын

University of Oxford mathematician Dr Tom Crawford is joined by fellow ‪@numberphile‬ presenter Ben Sparks to breakdown the 2019 GCSE Higher Maths Exam (AQA). Individual question timestamps below.
Watch Tom sit the exam here: • Oxford University Math...
Watch Ben attempt the same paper here: • GCSE Maths Exam Live -...
You can download the test for yourself here: tomrocksmaths....
And the mark scheme is here: tomrocksmaths....
Discussions of individual questions at the timestamps below:
Q1 8:51
Q2 9:34
Q3 10:07
Q4 10:57
Q5 11:40
Q6 13:50
Q7 17:31
Q8 19:33
Q9 21:23
Q10 23:27
Q11 27:58
Q12 29:14
Q13 29:59
Q14 35:09
Q15 38:40
Q16 40:50
Q17 43:01
Q18 46:24
Q19 49:17
Q20 50:58
Q21 1:01:28
Q22 1:02:42
Q23 1:06:43
Q24 1:06:56
Q25 1:08:29
Q26 1:11:01
Q27 1:13:36
Produced by Dr Tom Crawford at the University of Oxford. Tom is an Early-Career Teaching and Outreach Fellow at St Edmund Hall: www.seh.ox.ac....
For more maths content check out Tom's website tomrocksmaths....
You can also follow Tom on Facebook, Twitter and Instagram @tomrocksmaths.
/ tomrocksmaths / tomrocksmaths / tomrocksmaths
Get your Tom Rocks Maths merchandise here:
beautifulequat...

Пікірлер
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
Watch me take the exam here: kzbin.info/www/bejne/noK5lKljiZx8n7s
@Hope4thebest6969
@Hope4thebest6969 3 жыл бұрын
Lucky that KZbin recommended your video to me!!
@TomLeg
@TomLeg 3 жыл бұрын
This is great for 16 year olds to see math-expert adults working on their exams.
@missachin5054
@missachin5054 3 жыл бұрын
It was even better to see that the paper they did was exactly identical to the mock I had today 💀🤣
@kaspervestergaard2383
@kaspervestergaard2383 3 жыл бұрын
@@missachin5054 Is this really for 16 year olds? Seem extremely difficult.
@missachin5054
@missachin5054 3 жыл бұрын
@@kaspervestergaard2383 this is the easy stuff I’m gonna be honest 😂
@kaspervestergaard2383
@kaspervestergaard2383 3 жыл бұрын
@@missachin5054 Really? I know I'm bad at math, but this seems far from easy.
@chrysoz9031
@chrysoz9031 3 жыл бұрын
@@kaspervestergaard2383 this stuff is actually pretty easy, what grade are you in?
@melysmelys2622
@melysmelys2622 3 жыл бұрын
Discussing WHAT you should write down when answering exam questions is extremely useful to GCSE and A-level pupils. This video should be played in school Maths lessons. Thank-you so much.
@SirCumference31
@SirCumference31 3 жыл бұрын
To get top grade (grade 9) on AQA 2019 you needed to average around 86% across 3 exams that included this one. Both Tom and Ben got above 90% so were on course for a 9 :)
@ranpancake
@ranpancake 3 жыл бұрын
was refreshing seeing how people who've excelled in maths take on a GCSE paper, nice one!
@chraketcm8608
@chraketcm8608 3 жыл бұрын
My tutor gave me what was, for me at least, amazing advice when tackling exam papers. First thing you do, when the timer starts, put down all your stationery, and read through the paper. You will see many questions where you know you have the knowledge to at least tackle them, and also to do those ones first. If the first few questions happen to be ones that trip you up, you can get into a really anxious state so easily, when the rest of the paper may be fine for you. Going through the ones you're confident with first helps you settle so much better. Really helped me with my anxiety for exams :)
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
this is excellent advice!
@ragnkja
@ragnkja 3 жыл бұрын
To anyone taking a real exam and tends to refine their graphs by drawing it in multiple strokes like Tom does: draw and refine it in pencil first, then trace the final line in pen and erase your pencil sketch. Even if you’re unable to completely erase it, the single pen line removes any ambiguity about which exact line you consider to be your final answer, and that ambiguity is the biggest reason they deduct points for feathering.
@wesleyml3682
@wesleyml3682 3 жыл бұрын
When I was in school we would have gotten 0 marks if we drew a graph with pen lmao
@ragnkja
@ragnkja 3 жыл бұрын
@@wesleyml3682 Then use a heavy pencil stroke for the final line and erase the initial light strokes as best as you can. In any case, do your best to make it unambiguous.
@timothyaugustine7093
@timothyaugustine7093 3 жыл бұрын
What I use is a curve ruler to draw the graphs perfectly without feathering lol 😂🤣🤣
@timothyaugustine7093
@timothyaugustine7093 3 жыл бұрын
If it's a sketch, I'll just draw out the shape and label the points.
@wesleyml3682
@wesleyml3682 3 жыл бұрын
@@ragnkja Of course! That's what I'd do, for the times when there was any difficulty, of course. :) Thankfully those days are long gone and in university I only ever need to plot using R and Python.
@TheGCSEMathsTutor
@TheGCSEMathsTutor 3 жыл бұрын
This is such a great video! I’m so glad I discovered your channel today, I know my students will find this kind of discussion incredibly useful! Keep up the fantastic content 😁🙏🏼
@floreaciprian9742
@floreaciprian9742 3 жыл бұрын
I totally agree. I dont use maths in my day to day job, but I do some at home out of passion. I had an absolute blast watching these videos and I'm sure that young students will too. The relaxed nature of the videos and seeing two teachers do what they will soon do in the future could be eye opening and motivating for them. Hope you'll have success with them
@enigma7791
@enigma7791 3 жыл бұрын
It's pretty awe inspiring to see how a maths whizz brain works. Both you people are what I wished I was when doing O level maths all those years ago. Our young peoples maths progress is in good hands not just from your knowledge but your kindness and the way both of you are as human beings. Back in my day maths teachers instilled fear and were mostly grumpy, aggressive teachers that were only interested in the real high flyers of the class.
@charlieknight1016
@charlieknight1016 3 жыл бұрын
Got my mocks in 2 weeks, coming in clutch Thanks Tom!
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
Good luck!
@TheFunfighter
@TheFunfighter 3 жыл бұрын
For the triangle and tangent problem, you could have also argued that the triangle can be cut down its symmetry line. That symmetry line is square to the remaining side AB. It's also a symmetry line of the circle, because it's a symmetric triangle in a circle = hits the center. So the same as the sqare line to the tangent in point C. AB is square to CO, CO is square to CD. = parallel.
@fzoid3534
@fzoid3534 3 жыл бұрын
I'm out of school for 15 years and had nothing to do with math directly anymore. No idea how I got here but I really enjoyed doing the test along
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
awesome!
@millstonebarn
@millstonebarn 3 жыл бұрын
What a brilliant video. Fantastic chemistry between you both, and super useful for students (or their teachers) in providing insights into the marking schemes used behind the scenes and therefore what is important. Well done do you both.
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
Our pleasure!
@dullaf4099
@dullaf4099 2 жыл бұрын
No chemistry here, it’s mathematics only. Chemistry is an entirely different subject. Chemistry.
@costrix5697
@costrix5697 2 жыл бұрын
@@dullaf4099 not funny
@gk-qf9hv
@gk-qf9hv 3 жыл бұрын
Question 24 iand 27 are straight forward if you use the Unit circle. And please note that the graphes that you two drew, are derived FROM the unit circle! Now I'm just being a math teacher :) But hey, I LOVE this video! Please do more..
@davidgould9431
@davidgould9431 3 жыл бұрын
55:40(ish) Ben is correctly explaining the Alternate Segment Theorem: ACD = ABC. I'm pretty sure that, in his "doing the exam" video, he said ACD = BAC (which is, in general, wrong) and was worried about not having used the isosceles property of triangle ABC. That last fact is what makes ACD = BAC. My suspicion is that Tom should not have awarded full marks here (Tom admits to not having followed the geometry - give the guy some slack: he's a brilliant mathematician but not a geometer). Perhaps I need to keep watching... (bad habit of commenting before the video ends) Having worked through the mark scheme, I am so, so glad that I don't have to mark these papers. Am totally loving this series of videos!! (Note to self: look out the A level ones).
@davidgould9431
@davidgould9431 3 жыл бұрын
The unavoidable q20. The mark scheme also allows the dropping of the perpendicular from C to the midpoint of AB through the circle centre (it's an isosceles triangle) and that goes through the centre of the circumscribed circle (symmetry, but easy to prove if you are bored). So you have a right angle with AB and a right angle at CD, so internal angles add up to two right angles, so you have two parallel lines.
@marting1
@marting1 3 жыл бұрын
Yeah. That line you can draw from C to the middle of AB is how i figured that one out. Once its there the rest is easy to spot the rest.
@navidtawsif9609
@navidtawsif9609 3 жыл бұрын
how to prove perpendicular from AB to C passes through center of circle?
@davidgould9431
@davidgould9431 3 жыл бұрын
@@navidtawsif9609 You'll need a pencil and paper to follow this: sorry. If only I could post pictures. This is might not be the simplest way to show that the perpendicular from the apex of an isosceles triangle to the opposite side goes through the centre of the circumscribed circle, but here goes: Consider an isosceles triangle ABC, with AB = AC. Let the centre of the circumscribed circle be O, then OA = OB = OC because they are radii. Triangles AOB ≅ AOC by SSS (AO = AO (shared), AC = AB (isosceles Δ) and OB = OC (radii)). Therefore ∠BAO = ∠CAO = ∠ABO = ∠ACO because of the congruence and Δs ABO and ACO are also isosceles (radii of the circumscribed circle). Let ∠BAO = α then ∠AOB = ∠AOC = (π - 2α) Draw OM perpendicular to BC where M is on BC. OB = OC (radii), so ∠OBM = ∠OCM. ∠OMB = ∠OMC = 90° by construction. Therefore ∠BOM = ∠COM = (90° - ∠OBM). Now, ∠BOC = 2π - 2(π - 2α) = 4α. ∠BOM = ∠ COM = 2α. ∠AOB + ∠BOM = (π - 2α) + 2α = π therefore AOM is a straight line and AM is the perpendicular from A to BC that goes through O, the centre of the circumscribed circle. QED. Edit: it might be quicker to assume the theorem that says the angle subtended by a chord at the centre of a circle is twice that subtended at the circumference. That gives you ∠BOC = 2∠BAC and then you draw OM and go from there. To prove that theorem, you basically do what I did above, so they are equivalent and my proof doesn't assume the angle at centre theorem.
@krystalcheung3682
@krystalcheung3682 3 жыл бұрын
I find it so intresting as just went on a trip with my class and ended up seeing him give a talk, then I realised I already knew him from youtube. Loved the talk about how maths can save the environments keep up the good work.
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
Glad you enjoyed it today!!
@davidgould9431
@davidgould9431 3 жыл бұрын
Sorry about the excessive comments below. This was amazingly interesting. Blimey! Teachers marking these papers have a real job on their hands (I read the marking scheme because, well, OCD, probably). And the pupils taking these papers seem to have to learn an "exam language" where some keywords give a clue about what you need to do and in how much detail. I don't remember that from 40+ years ago when I was doing O levels (probably my age). I'll go now: I promise.
@craig1231
@craig1231 3 жыл бұрын
@38:00 A quick way to calculate the sum internal angles of any polygon is (n-2) * 180. Where n is the number of angles. Also for 3D geometry, F + V = E + 2, where F is the number of faces, V (vertices) and E (edges)
@hettvaya
@hettvaya Жыл бұрын
thx i didnt know that!
@tobiasnewland8298
@tobiasnewland8298 11 ай бұрын
This is an amazing Maths conversation. Regarding Question 20. If you remove the Isoceles condition that AC=BC. Then the Chord formed by AB can go through a whole variety of angles to the tangent CD. If for instance AC is tiny and BC is maximised then the angle will be almost 90 degrees. Likewise is BC is tiny and AC is maximised it will be -90 degrees. If you imagine a whole series of possibilities for the chord AB it will form a continuum between +90 degrees and -90 degrees according to the different lengths of AC and BC. Halfway between these two possibilities (+90 degrees and -90 degrees) there must be some combination of lengths of AC and BC where then angle between the tangent CD and the Chord AB is zero (ie they are parallel) It makes sense for this to be halfway along the diffferent possibiilties for the lengths of AC and BC when they are equal. This seems intuitive reasoning to me but I am not sure whether this would be a good enough proof to get the marks in this question.
@abbe23456789
@abbe23456789 3 жыл бұрын
You guys need to do another exam, this was great!
@missachin5054
@missachin5054 3 жыл бұрын
It was great to see that the paper they did was exactly identical to the mock I had today 💀🤣. Yes they should do another, perhaps I’ll get lucky again 🤣
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
We will - coming in 2022!
@jenni5104
@jenni5104 2 жыл бұрын
@@TomRocksMaths Do English and let's see if the rumours about either numbers or letters is true 😂
@asamet2007
@asamet2007 3 жыл бұрын
Great non-competitive math test video 👏👏 I just want to say that the last question is much easier than what you both thought: Cos(x)= sin(60) x [sin(30)/cos(30)] >> cos(x) cos(30)= sin(60) sin(30). >> x= 60. {because cos(y)= sin(90-y)}
@robertwoodruff8491
@robertwoodruff8491 3 жыл бұрын
Read my comment, apparently you would have got 0 marks for this.
@asamet2007
@asamet2007 3 жыл бұрын
@@robertwoodruff8491 why is that?! I’m 100% sure this correct, you can even prove it.
@robertwoodruff8491
@robertwoodruff8491 3 жыл бұрын
@@asamet2007 Did you read my other comment I posted? I say the exact same thing. I even go into further detail explaining how cos(x)=sin(53) x tan(37) couldn't be solved the way they did it, but can clearly be solved this way. The problem is that the marking guide doesn't allow for it. M1 in the marking guide basically says you have to come up with values for sin(60) or tan(30) or cos(30) and sin(30). You have to come up with the actual values. M2 says once you have those values you have to use the values to find x. Writing down cos(x)=1/2 is enough to get the points on M2. But writing down cos(x)=cos(60) isn't. You can't get points on M2 without getting points for M1 it's "M1dep" Then to get points for A1 you have to write down 60 AND get points for M2. Don't believe me? Check out the marking guide: tomrocksmaths.files.wordpress.com/2021/10/aqa-83001h-w-ms-jun19.pdf So no points for you or me. 😞
@richardfarrer5616
@richardfarrer5616 3 жыл бұрын
For cos(x) = sin(60).tan(30), you can solve by remembering tan = sin/cos and sin(90-x) = cos(x). sin(60).tan(30) = sin(60).sin(30)/cos(30) = sin(60).cos(60)/sin(60) = cos(60). Therefore x = 60, even if you don't know the values for sin and cos at those angles.
@tenkochilante1435
@tenkochilante1435 3 жыл бұрын
would love to see you attempt the A level Math paper from Singapore, especially the H2 and H3 levels... really want to hear your opinion on these papers especially given that they are set by the same cambridge authority as the international/uk A level and yet they are so so different from each other!
@garyhughes1664
@garyhughes1664 3 жыл бұрын
A question I’d love to see you solve is to find ‘r’ (sometimes written as ‘i’) in an annuity formula. I once tried to make each letter the subject in the formula, but got stuck with ‘r’, which appears twice, before being told by someone it cannot be done. I saw a video where a ‘brute force’ method was used to get an approximation of ‘r’, but I was quite confused as to what was going on. Yet it still baffles me why ‘r’ cannot be made the subject using factorisation and knowledge of algebra. The formula looks like this: A = P [(1+r)n -1/r] where n is a power. Pls consider solving this in a future video. By the way, really enjoy your videos and have learned a great deal from watching them.
@sampan04
@sampan04 3 жыл бұрын
Ay, was doing some revision to keep up my knowledge during holiday and now you come out of knowhere. Thanks!
@JordanTurpin_10
@JordanTurpin_10 2 жыл бұрын
It's weird watching this now knowing I had sat this exam 3 years ago, doing it now and seeing the little mistakes I had done back then recorrected by myself. Great video series otherwise for people doing either gcse or a level maths seeing someone higher doing it
@jamesclewett512
@jamesclewett512 3 жыл бұрын
That was great fun, thank you both for taking the time to do that. Based on the tutoring that I have done, I think that's really useful for GCSE maths students to watch. (I couldn't agree more about the circle theorems, I hate the GCSE syllabus for doing this, what is it trying to achieve?)
@davidgould9431
@davidgould9431 3 жыл бұрын
1:11:50-something. Tom asserts that he should have had the marks if he had differentiated (apparently not a GCSE thing - I have no idea, my maths O level (the then equivalent) was over 40 years ago). That reminds me of Mathologer (definitely a non-remunerated plug: subscribe to TRM and Mathologer and have multiple excuses to not do the washing up) who had, in uni, a proof rejected because it wasn't the one in the course (even though it was right).
@johngould3253
@johngould3253 3 жыл бұрын
Cool name
@davidgould9431
@davidgould9431 3 жыл бұрын
@@johngould3253 Haha - I blame my parents.
@fbijackson9308
@fbijackson9308 3 жыл бұрын
I’ve been waiting for this video🤝👏
@gk-qf9hv
@gk-qf9hv 3 жыл бұрын
Such a Great video! One of the best Math videos out there..
@djwilliams8
@djwilliams8 3 жыл бұрын
As a teacher, this was fantastic and useful!
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
glad you found it so!
@pm0neypenny
@pm0neypenny 3 жыл бұрын
I never thought I would like maths again after A-level and then Software engineering at uni but its kind of like car crash watching... I cant stop lol. Kudos Dr!
@pm0neypenny
@pm0neypenny 3 жыл бұрын
I mean that in a nice way btw I didn't mean it about your maths lol. Your both pretty amazing at your 1's and 2's
@gtanz8475
@gtanz8475 3 жыл бұрын
Parents (who are teachers) and School Teachers are the MOST IMPORTANT PEOPLE IN SOCIETY.
@esquilax5563
@esquilax5563 3 жыл бұрын
55:10 if you have an isosceles triangle inscribed in a circle, doesn't the line bisecting the triangle between the two equal-length sides necessarily pass through the centre of the circle? Which would make it perpendicular to the tangent line, and then the rest follows easily. Unless I've missed something here, it looks like the extremely wonky diagram they used has deliberately obfuscated what should be an intuitive fact
@johnchessant3012
@johnchessant3012 3 жыл бұрын
I definitely want to see you both attempt a Senior Math Challenge or BMO Round 1 exam! I think it'll be an interesting "not competition" if you don't immediately know how to solve every question haha
@aidanmcdonagh7861
@aidanmcdonagh7861 3 жыл бұрын
Yeah watching Tom and Ben do one of the UKMT papers would be really interesting, those things were my nemesis! 😨
@Whales1992
@Whales1992 3 жыл бұрын
The more advanced the questions the exams get, the easier it becomes for him to solve it. The only difficulty is him trying to remember basic maths equations to figure them out.
@TheArizus
@TheArizus 3 жыл бұрын
Yesss do a UKMT paper cuz it will be fun to see an oxford academic approach problem solving orientated questions
@FManga18
@FManga18 3 жыл бұрын
In Q20 I didn't use that fancy theorem, I drew the perpendiular from C to the centre, so we have that the angle we care (the one equal to x and therefore the two lines are parallel) + another angle (let's call it y) is 90 deg. Now y is an angle on the base of an isoceles tirangle with "big" angle 2x (it insits on the same point as the startign triangle and therefore is the double). So y=(180-2x)/2=90-x but then 90=y + angle we care=90-x+angle we care=> angle we care=x
@AndrewWebbLFC
@AndrewWebbLFC 3 жыл бұрын
Person who disliked is the 4th friend who wasn't invited to the party
@gk-qf9hv
@gk-qf9hv 3 жыл бұрын
Quadrilateral has 360 degrees because you can always divide it into two triangles. Quite a surprize that you could not figuer this out .. But I love the openess!
@JT-gr3wp
@JT-gr3wp 3 жыл бұрын
Bro shush
@topilinkala1594
@topilinkala1594 6 ай бұрын
I remember an exam where first part was limits and second part was derivatives. Because the time was generous and I kinda knew I get trough the exam with spare time I decided to work it little differently. I first proved Hopital's method and used it to solve the limits. I got F from that part.
@scragar
@scragar 2 жыл бұрын
Re: sum of internal angles I always imagine something I was shown as a kid where you just add a triangle to an existing shape such that a side matches and all the internal angles would still add up for the new shape and since you replaces one side with 2 it's a net change of +1 side. Triangle + triangle = square, so must be 180°+180° = 360° Square + triangle = pentagon, so a pentagon must be 360°+180°=540° Etc.
@edwardnigma4033
@edwardnigma4033 3 жыл бұрын
18:02 smooth catch
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
I'm glad someone noticed!
@timkw
@timkw 3 жыл бұрын
35:56 you can always split a quadrilateral into two triangles with 180 deg each, so it would be 360 deg for any quadrilateral Just saw 38:01
@Zonnymaka
@Zonnymaka 3 жыл бұрын
30:17 here we go again...it says "the triangular CROSS SECTION of a prism", not "this is the whole prism". Hence the volume of the given triangular cross section is equal to 51cm^3.
@zirkereuler5242
@zirkereuler5242 3 жыл бұрын
the cross section of a solid is a figure/plane, it doesn't have a volume
@syedrehanfida
@syedrehanfida 3 жыл бұрын
I'm excited for another series! :D
@fatsquirrel75
@fatsquirrel75 3 жыл бұрын
Feathering penalty should be for students trying to sneak an obviously wrong answer through by having different lines go through different points and appear to be one graph. Here it was very clear what the intended line was. Harsh marking was harsh.
@TheFunfighter
@TheFunfighter 3 жыл бұрын
Grading scheme of a physics prof I had: Perfect answer = 3 points Perfect answer, no unit only in the final answer = 2 points Anything else = 0 points
@alexanderzack3720
@alexanderzack3720 3 жыл бұрын
i remember when i learned about sin, cos, and tan we neither had those triangles nor any graphs. my teacher just gave us a paper and said "here are some important to know numbers for sin and cos. learn them" .... i don´t have to explain i already forgot those exact numbers, the only thing i remembered was "yeah sin60 was one of those numbers i had to learn"
@dexterhh2681
@dexterhh2681 3 жыл бұрын
I feel smart now I was 1 mark off a Dr of Maths score on a maths exam when I was doing my GCSEs
@bluerizlagirl
@bluerizlagirl 2 жыл бұрын
Ben, I totally agree with you on mixed integers and ratiometric fractions! They are as obsolete as Roman numerals. By all means leave ratios unsimplified to preserve accuracy during calculations, but there's no reason to describe something like 5/2 as anything besides 5/2 or 2.5. All real-life measuring instruments -- rulers, voltmeters, weighing scales ..... --- read decimal fractions anyway ..... #RealLifeIsDecimal Also, "engineering notation" is a special form of exponential notation where the exponent is always a multiple of 3 so as to line up with a measurement prefix. For example, 589 * 10 ** -3 as opposed to 5.89 * 10 ** -7.
@euromicelli5970
@euromicelli5970 3 жыл бұрын
For Q10, without marking/scoring guidance I had penalized Ben because he drew the curve all the way through x=5 and missed the correct value of Y(5) by 2. I’m glad to see the guidance is precise enough that it clearly states that this must be ignored.
@nguyenkhoanam7386
@nguyenkhoanam7386 3 жыл бұрын
Letsss goooo, TOM you are an actual math giga chad
@eoghanmeehan4393
@eoghanmeehan4393 3 жыл бұрын
It would be interesting to see you do the Irish leaving certificate maths exam too
@Darkraz
@Darkraz 2 жыл бұрын
Great personalities very enjoyable to watch
@TomRocksMaths
@TomRocksMaths 2 жыл бұрын
Glad you enjoyed it :)
@AceOfHearts001
@AceOfHearts001 2 жыл бұрын
DCA = BAC due to "alternate angles" btw.
@andyonions7864
@andyonions7864 2 жыл бұрын
Standard form is a number between 1 (inclusive) and LESS than BASE times a power of BASE. BASE in this case is 10. Floating point numbers (in computing) are the same format only the base is 2 and the power represents a shift value. (There's also a strange bias usually). The double line on the reciprocal graph (which I saw you making in the previous video) looked like an issue to me. Had you infilled it bold, you might have 'got away with it'. The simplify fully is a bit rough, but 4 and 6 do have a common factor... I somehow got to Comp Sci degree level without knowing the difference of squares identity, but I used the sum of squares identity months later in commercial programming to optimize multiply to 3 square look ups. I've been teaching my son some O-level maths and the alternate segment theorem cropped up. Again, news to me. It's said, you wouldn't ask Einstein to do a simple calculation, so the special case looks fine. Overall what strikes me most is that marking these things is way harder than doing them. I now have an appreciation that the marking system is remarkably fair. Nice video guys.
@hammerth1421
@hammerth1421 3 жыл бұрын
I love how both of you are complaining about GCSE "command words" the same way I am complaining about them in the German A-levels equivalent. Even worse, some of those are used in multiple subjects but mean slightly different things in each.
@RTNB884
@RTNB884 3 жыл бұрын
Please do videos about math high school and how to improve math skill in high school
@jellyfishguitar4163
@jellyfishguitar4163 3 жыл бұрын
Hello Tom, it is fascinating to watch these kind of videos! I live in Hong Kong and we have Public exam call the HKDSE. You should try doing it :)))). There are many practice paper or past paper in the Internet :)))
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
thanks - added to my list :)
@jonathanm9545
@jonathanm9545 3 жыл бұрын
Do a video on the Irish leaving cert maths paper and compare to A level paper.
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
it's on my list, thanks!
@davidgould9431
@davidgould9431 3 жыл бұрын
Sorry, guys: I'm being a super-grumpy old man tonight. At about 1:08:00 you both agree that, when looking at sin and cos, the graphs are helpful. I'm not a professional mathematician nor a maths communicator but I don't find squiggly lines terribly informative. Especially when it's super-hard to remember which starts at 0 and which starts at 1. On the other hand, the unit circle is easy to draw, to an acceptible level of accuracy. Then you only have to remember that cosine is the x axis value and sine is the y axis value and you are good to go. As a bonus, it reminds you that you get the same sine or cosine value every time around the circle.
@fatsquirrel75
@fatsquirrel75 3 жыл бұрын
Remember the small angle theorem. For small values of sin, the answer is approximately the value. So for zero, sin is zero. Makes drawing sin very easy. Or remember Tan is sin/cos, and that tangent is rise/run. Then picture the unit circle. When angle is zero the rise is o, the run is 1. So sin 0 = 0, cos 0 =1
@ImDoubleDelight
@ImDoubleDelight 3 жыл бұрын
Writing really good questions and allocating marks is a highly refined skill. Poorly written questions lead to poorly constructed mark schemes. 1 mark should be awarded per concept, calculation or demonstrated skill.
@AceOfHearts001
@AceOfHearts001 2 жыл бұрын
I would have awared the mark on the graph Q. I would look at it and think the students first line wasnt going through the points so he drew a second line and it wad clear you drew large crosses at the correct points to show the correct intend line. It is difficult to cross out graphs lines close together... definitely not gona penalise on that if I was an examiner
@SteenWinther
@SteenWinther Жыл бұрын
I can't believe that you both still are complicating 20a) when it is dead obvious that a line from C to the midpoint of AB goes through the center of the circle and is therefore perpendicular to both AB and the tangent through C. (It does helps to draw the figure accurately).
@generalkentuckygk4259
@generalkentuckygk4259 3 жыл бұрын
Just remember that there are 2 triangles in a quadrilateral. So there are 360 degrees
@Willabrador
@Willabrador 3 жыл бұрын
Brilliant thanks both!
@davidgould9431
@davidgould9431 3 жыл бұрын
1:07:40 and thereabouts. I was genuinely shocked when they both drew sine graphs to try to figure out values of sine(whateveritwas). Someone (sorry, can't remember who: google is your friend) once remarked that trigonometry is not about triangles: it's about circles. It might have been 3blue1brown. Or not. Or maybe I'm remembering something else. There was this sin/cos thing, and they did'nt draw the 2/1/√3 right angled triangle to get the sin and cos of π/3 or π/6 I'm probably over-thinking this. And, as usual, being annoying.
@davidgould9431
@davidgould9431 3 жыл бұрын
Look who can't correctly punctuate didn't!
@davidgould9431
@davidgould9431 3 жыл бұрын
And at 1:14:37 Ben is doing the triangle thing. I guess it just shows how our brains make too many short cuts when under pressure and just do the first thing they think of. Which, in the case of my brain, was posting those earlier, er, posts.
@DinizEngland
@DinizEngland 3 жыл бұрын
My faith in humanity has been restored. Nerds worldwide should do this stuff from AI/Machine Learning to Programming, Medicine, Quantum Computing, Law and Aircraft Technology.
@tarunsinghshekhawat8692
@tarunsinghshekhawat8692 3 жыл бұрын
TRY JEE ADVANCE MATHS paper
@cronus790
@cronus790 3 жыл бұрын
Could u make a highschool math exam of december from Belgium? From 11th grade, field of study ‘Wetenschappen Wiskunde’ or in english ‘Science-Math’ 11th grade is the hardest year in belgium and only a few people pass this math exam, the really smart people get like 60%. Average people get like 20%-30%. In my school only 2 people passed the 11th grade of this field of study and are now in 12th grade. Im in 11th and have to take this exam in december but i just heard its the most difficult exam in highschool
@howdoes8242
@howdoes8242 3 жыл бұрын
I really wanted to do my ug studies at Oxford but unfortunately because of personal issues i couldn't. I hope that i can do higher education at Oxford
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
fingers crossed!
@helms6561
@helms6561 3 жыл бұрын
Oh man do I have doosey of a video suggestion for you. -using Simpson’s method in order o find the centroid of an airfoil. -me and my senior design group were stumped for about 5 hours on it.
@eyeofthasky
@eyeofthasky 3 жыл бұрын
the word perimeter CANNOT be applied to incomplete circles as they do not have a perimeter, they r just arcs with a specific length, so to ask for the arc length is the only valid question. to ask about the perimeter is like asking about the hight of a wooden rod -- as its cross section is round, there is no hight vs. width -- one might get what u talk about, but its _intrisicly wrong_
@lib-center96
@lib-center96 3 жыл бұрын
This felt like a typical maths exam in Singapore.
@k2411871
@k2411871 3 жыл бұрын
Wonder if the good professor will try the Putnam Maths Exam?
@jjim6996
@jjim6996 2 жыл бұрын
Could u do AS level exam walk through pls?
@shirleythomas9921
@shirleythomas9921 3 жыл бұрын
Foundation tier students are expected to know sin cos tan of 30, 45, 60.
@velectro8963
@velectro8963 3 жыл бұрын
Wait really? I'm doing higher and I don't know any of those values. Would you mind telling me if you knew of what higher tier students are expected to know?
@harrisonbaguley5691
@harrisonbaguley5691 3 жыл бұрын
i know in edexcel you're expected to know sin, cos and tan for 0, 30, 45, 60, and 90 degrees. idk what aqa wants from you
@davedogge2280
@davedogge2280 3 жыл бұрын
It's the sort of maths exam that Albert Einstein would fail. Imagine a top C++ programmer being asked to sit an exam on binary division calculated by hand or assemly language etc
@sanuda3971
@sanuda3971 3 жыл бұрын
DO AN IB HL MATH PAPER!!!!
@H1289-h8o
@H1289-h8o 3 жыл бұрын
They’re easy
@bradc7215
@bradc7215 3 жыл бұрын
i retook a maths paper higher the other day , ive been gone for 3 years now out of school and i still got a B which im shocked considering i forgot so much stuff
@pfcsantiago8852
@pfcsantiago8852 2 жыл бұрын
Have you given O level a go from back in the day ?
@kainxjm
@kainxjm 3 жыл бұрын
Can’t believe MGK and Russel Crowe are doing a collab
@SaurabhSharma-ot6yw
@SaurabhSharma-ot6yw 8 ай бұрын
Hi I sat the o level in maths very long time ago. Are there any websites where I can get past GCSE further maths for free?😊
@StevoPvP
@StevoPvP 3 жыл бұрын
What does the long number tattoo on your right bicep mean?
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
it is the first 120 digits of the decimal expansion of e
@shirleythomas9921
@shirleythomas9921 3 жыл бұрын
56 mins - alternate angles, not corresponding angles
@Anonymous-vo8ks
@Anonymous-vo8ks 3 жыл бұрын
Could you make a video on coaltz conjecture and reimaan's hypothesis :) It'll be interesting to see those topics explained by you kkk
@Galaxian4444
@Galaxian4444 3 жыл бұрын
Nice video. You should try a Scottish higher maths exam.
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
it's on the list :)
@entekaontwitch3361
@entekaontwitch3361 3 жыл бұрын
i have a question…as a high school student i obviously have math that i’m required to answer later on in high school…and i understand the information. Actually i comprehend it to the point where it becomes mental math most to all the time…but after about a month i aways completely forget the information , like i go from it being easy as possible to not having anything “up there” any way i can fix that
@shaun2463
@shaun2463 3 жыл бұрын
Yes, do not go an entire month without using it.
@Wagw
@Wagw 3 жыл бұрын
Called it out. Question 20 😎.
@owen7185
@owen7185 2 жыл бұрын
How do you mark at Oxford Tom?
@owen7185
@owen7185 2 жыл бұрын
Face it Tom, after this you're enrolling to become a highschool teacher😂😂
@TomRocksMaths
@TomRocksMaths 2 жыл бұрын
Oh I couldn’t teach students that young. University for me.
@anishrawat3782
@anishrawat3782 3 жыл бұрын
BTW from where did you get the T shirt in UK. It's really cool
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
I think this one was from Topman
@Nonametopissyouoff
@Nonametopissyouoff 2 жыл бұрын
I'm having a hard time adding 1+1 so I'm really not sure how on the bloody universe I got here. I'm very confused especially since I watched the whole thing...
@TomRocksMaths
@TomRocksMaths 2 жыл бұрын
as long as you had fun!
@marting1
@marting1 3 жыл бұрын
Q20. Ben shouldn't get full marks since he didn't prove that they were paralell. He just talked about angles and what happens to them when you already know that the lines are paralell.
@Fredroix2
@Fredroix2 2 жыл бұрын
Makes me feel better about only getting a C in maths
@probablyshadman
@probablyshadman 3 жыл бұрын
Love from Bangladesh 🖤🖤🖤
@alexanderzack3720
@alexanderzack3720 3 жыл бұрын
while this is very interesting and decently entertaining i have to ask: when you graded the other´s paper, did you do it from knowledge, look it up again to refresh memory, or did you have the correct answers lying around to check
@TomRocksMaths
@TomRocksMaths 3 жыл бұрын
we used the official mark scheme
@owen7185
@owen7185 2 жыл бұрын
Moderator's meeting 😂😂😂
@TomRocksMaths
@TomRocksMaths 2 жыл бұрын
Pretty much!
@basedhutao775
@basedhutao775 2 жыл бұрын
Fun fact: my teacher taught me the differentiate and i used it in the exam
@mysteryguitarhaziq
@mysteryguitarhaziq 3 жыл бұрын
Im new to thischannel and im wondering is there any basic elementary maths lessons
@shaun2463
@shaun2463 3 жыл бұрын
Search KZbin for "Circle Song" by Dave Mitchell. Thank me later.
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