Leaving Cert Higher Level Maths Mock 2019, Paper 2 (DEB)

In this video I do every question in the Leaving Cert Maths Higher Level Mock 2019 from DEB. Below you find a link to each question, just click on the relevant timestamp.
Time stamps for each question:
Q1 - 0:25 Q6 - 1:05:19
Q2 - 10:23 Q7 - 1:16:25
Q3 - 27:30 Q8 - 1:41:54
Q4 - 44:04 Q9 - 2:01:44
Q5 - 56:54
Credits:
Kevin MacLeod: Carefree

[@cmcg6821]

this is amazing!! cannot thank you enough!

[@SimpleScienceandMaths]

You're welcome! Thanks for watching!

[@SimpleScienceandMaths]

Time stamps for each question: Q1 - 0:25 Q6 - 1:05:19 Q2 - 10:23 Q7 - 1:16:25 Q3 - 27:30 Q8 - 1:41:54 Q4 - 44:04 Q9 - 2:01:44 Q5 - 56:54

[@SimpleScienceandMaths]

Thanks for watching this video, for more tips check out our new facebook page and website! facebook.com/simplescienceandmaths www.simplescienceandmaths.com

[@awakeninqs]

thank you so much for making this

[@SimpleScienceandMaths]

You're welcome, if you've any questions don't hesitate to ask!

[@kjj7524]

For q2(b) if I found the distance from the from one corner of the parallelogram to the other using the distance formula and then the perpendicular distance from the point of the intersection to the side of the parallelogram then calculate triangle. I have already tried this and got 36 so I want to know if its something wrong with my workings or my method doesn't work.

[@alanearly18]

Thank you!!!!!!

[@SimpleScienceandMaths]

You're welcome, best of luck in your exams!!!

[@elainemcdonnell4605]

for question 5 (a) should it not be 1/120? I keep getting that as an answer from my calculator

[@SimpleScienceandMaths]

Absolutely!!! Sorry about that I was obviously thinking 1/120 but wrote down 1/20... -3 marks for me!

[@iandowney518]

For q9 b i could the one-sample z-test from pg 35 of the formulae be used instead

[@kipcole8248]

For question 4 b(ii), why can't you use the cosine rule on triangle SRQ as you have angle A(143.13 deg.) and side opposite (10 cm ) ?

[@SimpleScienceandMaths]

There's no reason why you can't use the cosine rule there, you have enough information to use it. In this case I thought the sine rule was more straightforward to use but you are free to use any method as long as you have the relevant information.

[@maryosullivan7907]

For question 6 b ii) when it asks to find the length of the blade how did you know it was half way between the max and min, I just don't understand how you can figure out the blade by using a circle

[@amnethercott5406]

Just wondering, for Q7 a) iv) I got -1.76 when I put the inverse tan into my calculator, how did you get positive 1.76? Thank you!

[@SimpleScienceandMaths]

Sorry for the late reply, hopefully you figured it out in the meantime but if you didn't: the calculator shows a minus but the reason why I worked with the positive is because it's the reference angle that I'm interested in which is positive in the first quadrant.

[@Ethaliano]

In Q8 (the sketch), why does the net include the base, when the question states that the light shade is open?

[@SimpleScienceandMaths]

The square in the middle is the open base. Its as if you just unfold it if it was sitting on a table. That's the net in the marking scheme, they didn't accept any other versions but I would think other versions should be fine

[@puke1523]

Hey, at 1:04:50, Could you please explain to me why the chance of 10 fails has no 10C10?I mean, I see the pattern, that you only look if there are any passes, but for the right side, when you look for 10C1, would you get the same result if you did 10C9 to find all the fails? that seems wrong to me, but in the real exam, I am unsure for which 10C I should go for.

[@SimpleScienceandMaths]

There is no 10C10 with the 10 fails because 10C10 = 1, you can put it in if you like and there is nothing wrong with doing so. On the RHS you could use 10C9 because 10C9=10C1, either one is technically fine but when using the formula for this we do nCr for the passes rather than the failures. In any case you should get the same answer because 10C9=10C1, 10C8=10C2, 10C7=10C3 etc...hope this helps, any further questions just ask!

[@puke1523]

@@SimpleScienceandMaths Oh wow, that actually helps alot, thank you! I expected 10C10 to be 1, and 10C0 to be same, but I did not expect 10C1 to equal 10C9. Thanks again!

[@SimpleScienceandMaths]

You're welcome, best of luck in the exams

[@SimpleScienceandMaths]

Hi, I noticed in my email notifications that you asked another question on about another part of the video but I can't find it, did you get sorted on this question?

[@puke1523]

@@SimpleScienceandMaths Oh yes, I have, and have deleted it because I found it, and it was silly ^^ It was a misconception of how sin, cos, and tan works, I had the angle and ratios mixed up

[@alexoconnor4198]

For question 3b did you not have to specify which line was L or K?

[@SimpleScienceandMaths]

No that was not important for this particular question. If there was a diagram showing the lines then it would have been important.

[@raymondhinds9020]

Hi wondering for q8 a part iii i think you used the wrong height for area i believe you are meant to use the slant height as it is the perpindicular height calculated in previous question

[@SimpleScienceandMaths]

Hi, I think you may be mixing up the sides. The slant height was found to be 29 in the previous part, this is the distance from the centre of the base to the top of the lampshade along the face. The other value that was calculated was x=35.23, this is the length of one of the edges where two triangles meet going from the base to the top. So the perpendicular height of a triangular face to calculate area is 29cm. Hope this helps!

[@JT-bw7oz]

hello i was wondering if you had leaving cert past mock papers

[@SimpleScienceandMaths]

Sorry I don't have any past mock papers unfortunately

[@sergejp4727]

hello, where can i find these past papers?, I try to search it up on the internet but i cannot find any. Any help would be appreciated

[@nataliana9089]

Q4(a) how did you get the co-ordinates of C?(bCosA,bSinA)

[@nataliana9089]

Nevermind,I got it myself,our teacher never taught us this😤

[@SimpleScienceandMaths]

Sorry only getting back to comments now! Glad to hear you figured it out, it's actually the best way to learn working through it yourself. Thanks for watching, if I can help with anything else just ask!

[@harryarkwright6069]

How do we know to use the margin of error in Q9(C)(ii)?

[@SimpleScienceandMaths]

Can you give me a time on the video to let me know exactly what you are referring to?

[@harryarkwright6069]

@@SimpleScienceandMaths 2:18:40 thanks

[@SimpleScienceandMaths]

The formula I used z(sqrt)p-hat(1-p-hat)/n is the one to use whne we are referring to a 95% confidence interval and p is unknown. Are you wondering why the 1.96 was there? If so it's because of the 95% confidence interval

[@slavefrommhw2238]

Thanks for sharing! I want to ask you, how did you get a hold of these papers so early? Thank you again

[@SimpleScienceandMaths]

You're welcome, thanks for watching. The papers have been out for a few months at this stage and most if not all schools have finished their mocks by now...

[@slavefrommhw2238]

I sent you an email if you could please check it out

[@SimpleScienceandMaths]

Done, thanks.

[@rachaelocm6577]

Can u do the lc OL 2019 paper?

[@SimpleScienceandMaths]

The mock paper or the real exam?

[@JasonBrown-ub6be]

Why do you multiply p value by 2 in Q9bii

[@SimpleScienceandMaths]

The p-value before multiplying by 2 gives the probability of being above your z score if 2.13, so when we multiply by 2 it gives us the probability of being >2.13 and

[@JasonBrown-ub6be]

Is question 1b i wrong as you put In .2 rather than .25 for B\A

[@SimpleScienceandMaths]

not sure exactly where you are asking about, what time on the video do you mean?

[@JasonBrown-ub6be]

At 9:12 you say .25 and then write down .2

[@SimpleScienceandMaths]

@@JasonBrown-ub6be ah I see now, i said it right, wrote down 0.2 by accident but the answer is right as I used 0.25 in my calculation

[@bjohbbdeloughery8920]

Sound for doing my hw u legend 💦💦

[@SimpleScienceandMaths]

Happy to help

[@bjohbbdeloughery8920]

Twas a hard one now tbh

[@JT-bw7oz]

Q9 - 56.54 (ii) how is the z score of 0.75, 0.675

[@SimpleScienceandMaths]

The difference there is the accuracy of the tables that the marking scheme used. If you look for 0.75 in your normal tables the closest you get is 0.7486 which gives a z score of 0.67, these values should have been accepted by the examiner

[@me-xi7gz]

Quick question so there's no series questions here?

[@SimpleScienceandMaths]

not on this paper as far as I can remember but it could come up on any paper really so best to be prepared

[@me-xi7gz]

@@SimpleScienceandMaths thank you😊

[@lancer4691]

28:09

[@SimpleScienceandMaths]

Yes?

[@lancer4691]

@@SimpleScienceandMaths sorry i was just marking it for myself lol

[@SimpleScienceandMaths]

@@lancer4691 no worries, good idea!

[@cathalkeenan8]

Junior cert

[@SimpleScienceandMaths]

unfortunately I don't think I have the time to do the junior cert paper, but if you have any particular question from it I might be able to get to it.