The Hardest Or Easiest Math Quiz Ever

** TODAY'S PUZZLE **
We have that rarity today of a really approachable and yet really elegant sudoku. It's called Arithmetic Quiz and it's a debut on the channel for mnasti2. The lovely thing about this puzzle is that you can really find some beautiful logic in it if you combine the sudoku side with the math(s). Enjoy.
You can try it at the link below:
tinyurl.com/44xh3nu6
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Rules:
Normal sudoku rules apply. (Place the digits 1-9 in each row, column and 3x3 box exactly once each). Each line must contain a true mathematical equation. (Two cell circles enclose 2-digit numbers; three cell circles enclose 3-digit numbers).
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[@ste221093]

Excellent puzzle, although I did laugh at how Simon deduced the 16 in row 4 by using the 5 and the 6 in box 4, instead of using the 4 :")

[@helar2574]

yeah, i was just sitting and looking at screen, while pointing my finger to the left

[@DMadHacks]

and he never noticed it later lmao

[@Schilani]

He glimpsed over the fact that 1-9 were already written in the first column as numers and not just question counters so often, it's quite amazing. I mean even later he put in 2 and 3 as pencil marks for the second and third equation.

[@acidhelm]

The puzzle was too easy, Simon wanted to make it a little bit harder. xD

[@Rubrickety]

I would have been laughing harder had I not done exactly the same thing during my own solve. One really does develop a blind spot for given digits after a while.

[@avishevin1976]

16:40 Simon is explaining why R4C5 can't be a 4. He does so by pointing out that 59 and 68 are not available to sum to 14. In both instances, he has to skip over the 4 at the head of the column. Classic Simon.

[@Saetanigera]

as long as he moves forward, I forgive the eccentricities that make him much better at solving these than I am

[@jounik]

The black digits are famously invisible.

[@Atomicslash]

It was so wholesome

[@onijester56]

Simon using Sudoku in a Sudoku puzzle? Unthinkable!

[@robinbrown6530]

@@onijester56 I think you mean.... INCONCEIVABLE!!! ;)

[@alyssagambone5544]

“This can’t be 14 because we can’t use 5 or 6 in the box” instead of using the 4 in the row is just classic. Thanks for the great solve!

[@SiculusTheEpithet]

One of my least favorite things about sudokus is when there is a moment where you have to hunt out a specific box that is the bottleneck to making progress, and this one does a great job of letting you solve from many different directions. I started from the top and moved down but going from the bottom up clearly works equally well, and I just really like that about this one

[@danruffolo8155]

Every now and then, when Simon is mostly done a puzzle, I think "Ok I can get it from here" and will try to solve the last bits on my own, but it's typically with almost all of the real break-in logic completed. This is the first time on the channel I felt confident I could get it right from the start and actually did so. What a wonderful puzzle.

[@SMmarcus100]

Great to see you on Cracking the Cryptic! I found this in the discord's archive on a whim, and thought it was wonderfully inventive! Congrats on your solve!

[@warren_r]

16 minutes. You could give me a whole book of these and I wouldn't get bored. Great idea for a puzzle!!

[@avitaltagar5726]

This was the first puzzle I was able to solve after years of watching the channel. I can't help but feel proud even though this was an easy one (it did take me 63 minutes though)

[@brianarsuaga5008]

Congratulations, it's an awesome feeling when you're like "Oh look, I can do these now"

[@christophercordes951]

I've knocked out a couple over the past year, but yeah 58 min for me. I find if I can finish them they are about 3 times longer than Simon or mark.

[@gatlygat]

Well done Avital. Congratulations, you have earned some cake as acknowledgement 😃

[@Terabiel]

Congratz on your first solve!

[@stevenape377]

Yay! :) Good work!

[@mnasti2]

Bonus points for completing the quiz in reverse! :D Thanks so much for the feature!

[@rontyson6118]

Lol, nice puzzle. :)

[@mrmosaic7996]

So this puzzle quiz was intended to be solved from top to bottom, wasn't it?

[@Nerketur]

So I solved it the intended way. Nice! Definitely a good puzzle. I loved it.

[@michaelpeele5739]

I did a little top, little bottom, middle, then all over, and also 4x+9+y=45 gave good progress.

[@dieguenec]

Man do I like when Simon explains why r4c5 cant be 4 by using the sums and completely ignoring the given 4 in r4c1. Good laugh, shows how people can so concentrated in something that they ignore their surroundings

[@Heka2]

As a mathematician watching this video: When I saw the 8th row I noticed it provided a lot of information on it's own so I was curious if one could solve the entire 8th row without gaining more information by starting with the other rows. Turns out, you can! :D Took me a little bit, but with some clever insights and some brute force at the end I found that there was only the 1 single solution that you would also get from solving the puzzle normally. If anyone wants to try to show this on their own you are highly encouraged as I had a lot of fun with it. If you are curious, here is how I did it: My main focus was trying to restrict the number of possibilities for the 2-digit number in the middle. Immediately you can notice that this number can't be a multiple of 11 (11, 22, 33,...) as we would otherwise have to use the same number twice, breaking sudoku rules. We can also notice that the number in the middle can't be one where the unit digit is exactly one less than the digit before it (e.g 21, 32, 43 ,54 ,65 ,76, ...). Those don't work because then the 2-digit number on the left of the equation would have to be more than 10 away from the number in the middle (for example when we have 54 in the middle, the 2-digit number on the left has it's maximum at 39, but 39 + a = 54 is never true if a < 10). The 2-digit number to the left also can't be higher than the one in the middle because we can only add to make them equal. Focusing our attention on the right side we can also see that primes are not a valid solution for the number in the middle as it can clearly be factorized into 2 factors. These factors are also never 1, because both factors are definitely less than 10 so if we assume that one of them is 1 we would have 1 times some 1-digit number being equal to a 2-digit number which can't happen. So primes are not a candidate for the 2-digit number in the middle. We can also rule out any non-primes that have a prime factorization with a 2-digit number (e.g.: 26, 51, ...) because one of our factors on the right would then have to be a 2-digit number, but they aren't. The highest number we can reach by multiplying 2 1-digit numbers is 56 = 7 * 8 = 7 * (9 - 1), because all other combiniations that would multiply to be higher run into some problem right away, like having to use an 8 or using 9 twice. So our 2-digit number in the middle has to be less than 56 as we also run into problems with 56, but it serves as a nice upper-bound. Lastly, we can't have any number from 11 - 19 as our 2-digit number in the middle as the other 2-digit number would then have to be at least 21, making this not work either. Doing all of that, we are only left with these numbers: 24, 25, 27, 28, 35, 36, 42, 45, 48, 49 "Only" I say, that's still so many 😭 Well, after getting to this point I could not find some clever trick to further reduce the number of possible numbers so I just brute forced it. After plugging these numbers in most of them fall apart very quickly (which I shall leave to you to verify cause I am too lazy to type out each case), but in the end they all fall apart except 24, which only produced 1 solution. Thus leaving us with the only solution being: 5 + 19 = 24 = 6 * (7 - 3) Thank you for reading this very nieche approach to a weird problem I created for myself

[@suncat530]

[@Heka2]

​@@suncat530 Glad you enjoyed the read

[@ArunIyerS]

Btw, not sure if Simon noticed this in the video, but the 1 to 9 are arranged in serial order, it is how the questions in a math quiz might be arranged as Question 1, 2, 3, ... and so on and each row corresponds to one question of the quiz. It is a really lovely layout 🙂

[@nix_]

16:35 Simon reasoning it can't be 14 because of the 5 and 6 in in the box, but completely ignoring the 4.😨 He looked at the two cells below the 4, and the two cells to the right of the 4. But he never looked at the 4.

[@peaches760a]

Loved this puzzle! Well done mnasti2, of course now you need to make an Arithmetic Quiz 2 that features some hidden negative values: (3-8)x(4-7)=15

[@th.nd.r]

That is so so nice. Love the ruleset and the aesthetics of the layout. It’s approachable, pretty, novel, and interesting all at the same time, what a wonderful combination! Well set and well solved.

[@jamesdonnelly9217]

Unbelievable to me how Simon manages to solve puzzles in almost the exact opposite way of what I do. The first equation is forced and therefore I think that makes the rest easier.

[@maljamin]

I can't believe I missed this. I tried a bit to fill in possibilities, thought some possible with 2 or 3 as the first tens digit. But sudoku. I'm a student of Simon.

[@k4it4n]

Yep, I did it in the same way, it was a really fun puzzle to solve

[@srwapo]

@@maljamin Ha, I didn't have the trouble in this equation specifically, but I did fail to look at the Sudoku boxes while working on the math rows a few times.

[@edwub8595]

I did it the same way - the given 1-2-3 in box 1 constrains the first 2 equations quite significantly

[@Aviivix]

I went an hour into the puzzle and didn't notice the first equation was forced at all throughout the whole thing until I started doing process of elimination on the sudoku notes! I broke in on the ninth row noticing that it was three different sums to equal one number which could only be 7 and then working out the 2/3 pair on row 7 after that and messing about there. Yours would have broke me in a lot faster!

[@xMrKadik]

That's the first time I tried and managed to solve featured puzzle. I struggled with row 9 cause I instantly assumed it would be 8 and not 7, but managed to get it in just over half an hour. Very happy about it :)

[@BoycottKentucky]

One of the relatively few I can solve with zero help. 29:57 for me.

[@SvviftDeath]

I made the exact same mistake and managed it in exactly 35min.

[@cathybryant5119]

I did the same thing and was then completely stumped over row 7! Especially since I did row 1 very early and then didn't have an 8 for row 7...

[@Terabiel]

Congratz on your first solve.

[@perladel95]

16:16 Yes... We knew it wasn't 14 xD

[@Wecoc1]

Classic Simon 😆

[@frankwales]

@@Wecoc1 Agreed, although to be fair, I can imagine forgetting that column 1 is part of the sudoku and seeing it merely as the numbering of the individual puzzles.

[@perladel95]

@@frankwales I'm just joking: tbf he saw the 5 and the 6 though

[@HunterJE]

@@frankwales I'd agree except he then immediately uses the 5 and 6 in the index row in his logic, I'm just going to go with "classic Simon"

[@inspiringsand123]

Rules: 03:19 Let's Get Cracking: 04:10 Simon's time: 19m08s Puzzle Solved: 23:18 What about this video's Top Tier Simarkisms?! Bobbins: 1x (13:05) And how about this video's Simarkisms?! Hang On: 7x (06:04, 07:28, 13:15, 16:44, 19:21, 19:59, 20:55) By Sudoku: 5x (05:06, 05:09, 14:49, 20:28, 20:32) Lovely: 4x (10:35, 14:58, 23:18, 23:18) Ah: 3x (06:08, 10:07, 22:51) Good Grief: 2x (18:17, 19:54) Sorry: 2x (06:19, 19:34) Brilliant: 2x (02:52, 03:08) The Answer is: 1x (08:02) Beautiful: 1x (01:03) Extraordinary: 1x (06:36) Elegant: 1x (08:39) Ridiculous: 1x (06:48) Approachable: 1x (00:56) Umpteen: 1x (01:13) Obviously: 1x (22:14) The Power of Maths: 1x (17:18) Cake!: 1x (02:52) Most popular number(>9) and digit this video: Twenty, Twenty Four (6 mentions) One (54 mentions) Antithesis Battles: Even (9) - Odd (0) Row (6) - Column (4) FAQ: Q1: You missed something! A1: That could very well be the case! Human speech can be hard to understand for computers like me! Point out the ones that I missed and maybe I'll learn! Q2: Can you do this for another channel? A2: I've been thinking about that and wrote some code to make that possible. Let me know which channel you think would be a good fit!

[@ravensrealm1170]

Could you add "peculiar" to the list of words/phrases? I find he says it so often and it would be very entertaining to see it kept track of😂

[@JohnDBlue]

I think you should perhaps add the full "Bilbo bobbins" to the list of Simarkisms :D

[@neilwaldock6272]

You need to add "cute".

[@SunDry_Marchy]

I love this Bot so much more with every time I see it

[@wissahdahmastah]

Long time watcher of this channel, never did any of the "extra" puzzles myself, just did some normal sudoko here and there. Saw this one and, as a maths teacher, just had to try it. 36:31! So proud of myself, even explaining things out loud (to myself), justifying my moves and using the great program with pencilmarks in the right way ... what a joy!!! Edit: And he did it completely differently than I did hahah, I started at the top, still very much a joy to see this!

[@vikingslayer34]

Been watching CTC for years now, and its still cool that you give the basic rules of Sudoko in every video for new viewers/solvers. Good work fellas. Heres to 500k and many more 🍻!

[@emilywilliams3237]

What a lovely puzzle. I solved it without too much difficulty, and had a blast doing it. I recommended that my son (who teaches math in middle school) be sure to take a look, as it would be very suitable for some of his students, I think. Thank you, mnasti2, for this puzzle and congrats on your channel debut! Simon, as always, your pleasure in finding, explaining, and solving the logical elegances in this sport of sudoku is contagious and very charming. I loved this video!

[@rayflyers]

It's nice to see a puzzle that shows you can be creative without being ridiculously hard.

[@tanyarussell6767]

Absolutely loved this ❤! Would love more puzzles in this format please!

[@oldguydoesstuff120]

I enjoyed this one. 19:04 for me. Like others, I had a completely different path though the puzzle, which is a testament to the puzzle's approachability. It doesn't force you through a single narrow path, but has multiple ways to get through it. I figured out a lot of the 1s and 2s first, then worked mostly from top to bottom. It was also my second time through this one, as I saw it on Bremster a short while ago.

[@10bd1]

Really enjoyable puzzle! Had so much fun solving it! 22:55 for me! Edit: it’s amazing how many different ways there are to solve the puzzle. I started with equation in row 1 and for the most part moved down. Much different from simon’s approach

[@srwapo]

Ha, row 1 was the 2nd to last that I worked on. It felt like it had some of the least clues in it where row 9 was packed.

[@David_K_Booth]

Yes, it's not a "how can I possibly begin this" puzzle, it's "there's so much going on here, surely there must be weak spots?" Like srwapo, I started at row 9.

[@GeorgeNewman795]

I’m a bit behind on CTC videos, and just got to this one. Decided to solve it myself before watching the video, and absolutely loved it. I am a math teacher (or maths if you prefer) in the US and I wish I could get my fifth grade students as interested in variant sudoku puzzles as I am. This was brilliant! I’d love to see more math puzzles like this one.

[@13ellamy]

What a great puzzle! I don't often attempt the puzzle without watching any of the video, but the comments of other people's success emboldened me. My solve was far less elegant, jumping all around the puzzle and completing it at 70 minutes (probably not helped by attempting it in the middle of the night) but still plenty of fun, and experiencing my own winding path honestly made coming back and watching the 20 minute solve even more enjoyable!

[@cyanophage4351]

This was excellent! I hope we see more puzzles like this 😊

[@gregind01]

16:15 Simon the easier way to determine that the 2 cell pill in box 5 is not 14 is to look at the 'invisible' black 4 that you have in column 1!😆

[@LookingForFrogs]

This puzzle has such a "back to school" vibe, it's like those maths exercise books tasks, that are meant to be fun for kids, only on a bit higher difficulty. I enjoyed finding the logic in this one.

[@paulcazza]

Exactly !!

[@dethii0510]

What a nice change of pace from the mindboggling puzzles you've been recently taking on,

[@georgeaman1938]

Thank you mnasti2 and Simon. It's a really nice puzzle!

[@willboy1234]

Proud to say this is quite possibly the first and only sudoku I’ve solved FASTER than Simon! As a novice solver and avid arithmetic nerd, it was very enjoyable. 😁

[@randomsammieable]

I really love this channel, and while I don't watch every day, I watch very often and do catch ups. It's my birthday today and this is the video I chose to view, since the starting formula looks so interesting. Thanks for the continued entertainment 😀

[@ianleonlo]

this was more entertaining, exciting and edge of my seat than i ever gave sudoku credit for. tip of teh cap to you sir, you've earned my subscription.

[@BremSterPuzzles]

I normally avoid puzzles based on pure math but this was recommended too many times and it was just so good. mnasti2 did an amazing job. I did find myself mostly answering the quiz questions in order.

[@pacman52280]

I remember watching you do this puzzle. I did it from top to bottom, like you did. Didn't solve it then, I solved it now. Did it my own way, which is placing as many pencil marks as can go in a box, then using logical reasoning and the process of elimination to figure it out. It's a lot slower than most methods, but it works for me and I have no interest in being a speed solver anyway.

[@MonkehBuns]

Same, I avoid the math-heavy puzzles, but I'm glad I stuck with this one!

[@MrSchesam]

It always feels strange, seeing a Puzzle here, that you already solved Weeks ago. But like that you can see another approach on that Puzzle

[@amysteele2488]

I thought it looked strangely familiar

[@juliancuber]

do you have the video?

[@alexisbssnt7176]

I’m so happy, this is my first time participating in one of these and I solved it in 49 minutes and 20 seconds

[@bertbergers9171]

Nice puzzle really! I thought for sure i was going to watch a Mark video (from the video length) and was surprised by the guitar intro, nice one Simon! You deserve a beautifull approachable one now and again.

[@richardyeakley6594]

Love this Would love a series of these.

[@olivier2553]

After 30 minutes walk to work, I enjoy cooling down with a soda watching Simon sort a box of bobbins. I feel cheated, I had to rush my drinking! I should have tried that puzzle myself, but I am brain lazy recently. Thank you Simon, it is always a pleasure to watch you solve a puzzle, easy or hard, no matter what.

[@evilhond]

Walk TO work?

[@olivier2553]

@@evilhond Walk to go to work, not using any mechanical transportation, only my own energy. I am not a professional walker :) Nor a native English speaker, solly, solly.

[@ThatGreenNugget]

I haven't watched much from this channel lately, but the puzzle looked so attractive from the thumbnail that I had to check it out. What a neat puzzle!

[@BrooksMoses]

21:34. Quite fun, indeed. And well set; the 1-9 in the left column is an entertaining set of clues to start with.

[@longwaytotipperary]

Loved the intro & outro! The puzzle was delightful!!!

[@janeflett4971]

Loved this! Great puzzle, really enjoyed solving it

[@firemaker282]

I loved solving this, but I loved even more watching you solve it after and realizing that we solved it in practically completely opposite ways. I started by solving the top boxes instead of the bottom ones.

[@LivelyLinnea]

this was a fun quiz. and the smile on simon's face was the best part

[@coloripple]

Hadnt visited this channel in about a year, so pretty rusty in my sudokus, I was happy to get just short of double of simons time. Lovely!

[@africacorpse8010]

What a well thought-out puzzle. Those long equations at the bottom look pretty wild at first, but once you uncover some of the digits in the upper rows, that eliminates all possible variations and suddenly an entire row of equation snaps into place.

[@joeysollazzo6025]

Its great how this puzzle can be approached in different ways depending on your logic. The very first thing I solved was the first row and than worked my way down.

[@matthewphillips5911]

Great puzzle. Thanks for the link and the solve!

[@Cook66]

I usually prefer the long videos, but as a short one, this was really cool. I already knew you were good at math, Simon, but watching this showed me how much more basic math you just have memorized than I do. I would have to think a bit to find several numbers and solutions here, that you just instantly put down. Quite impressive and lovely solve!

[@maximilianmaier3950]

I like both. The long ones are just amazing to watch and be amazed by his brilliance, but I like the shorter ones too, because I can try those puzzles myself. The only long puzzle I was able to solve was the chess sudoku, but usually I don't have any idea how to even start solving it

[@rbush88]

I really enjoyed this puzzle! It was quite approachable but really fun and didn't feel too easy

[@grzegorzkowalik3652]

FINALLY a sudoku that I can acutally attempt. This channel is amazing and the solutions are mindblowing, but sometimes I have to pause and think for like five minutes just how that logic works

[@SolarAnomaly]

Despite being easy, this was actually super fun. Great video as always!

[@LemonyFresh2000]

Never new there was a type of arithmetic sudoku! Very cool!! I'll have to finish it out next time before you go through it!! Got the bottom row (not in order) before I gave up and watched your speed through it lol, but now I know how to approach these!!

[@holyspork]

Love it! Fun, different, and approachable.

[@HideKikuchi1991]

Astonished by the way Simon chose the hardest way to find out about the 16 on row 4. 😂

[@zelandakhniteblade5436]

As a chess-playing mathematician, the last 2 days have been a little special. Thanks man! :)

[@MaierFlorian]

Finally a fun sudoku I'm capable of solving, first one since the 10-in-one-puzzle, thank you :D

[@j4v4x]

Beautiful puzzle, beautiful solve, the world makes sense (with a little bit of algebra), and Simon is wonderful! 😍 (Please excuse my fangirling all over the comments) 😊😁

[@kaitlynbrouillet6978]

This was so fun to watch!

[@ericpraline1302]

A combined total of about 20 minutes for both today's puzzles must be a personal record.

[@lisan9517]

This was my first time pausing the video to try to solve the whole thing before watching. I was able to, and it was a lot of fun! I enjoy arithmetic puzzles

[@stevenrburgoyne]

This is a great puzzle. If you take your time and think through everything it is very approachable, even for a novice. Well done.

[@redninja2511]

Final time for me was 21 minutes flat. Watched the video afterward. Loved how most of my solving was very similar to Simon's way of solving this. Great video! and excellent puzzle!

[@Gonzalo_Garcia_]

12:24 for me. I think I struggled a little bit too much with basic arithmetic here, but I definitely enjoyed that anyways. Very great puzzle!!

[@adamfenton7310]

It was nice that you could solve it in so many different ways. I worked it starting out with the R1 column realizing it had to be 40 something x 2, then cascaded down finding what was possible in each equation (that was within reason) and it just simplified itself the further you went.

[@cyclopsboi]

I felt good about that one roughly 40 min. The deductions around 5's,1's and prime's being eliminated from around multiplication/division stuff helped a lot. As did remembering there are no negative numbers in sudoku which forced the alignment of a few pairs. But I stared at a pencil marked grid for a lot longer than he did. I definitely went the long way around and leaned mostly on the math

[@nonagrey3422]

What a fantastic concept!

[@przemekmajewski1]

Absolutely hilarious! Super fun, 21 minute solve here.

[@nickatty462]

Fun and novel. I wouldn't like to do a lot like that, but as a one-off it was a great change. Thanks! Took me just over 25 minutes, which was surprisingly quick considering how much thinking I did

[@alexklink9777]

First featured puzzle I’ve attempted to solve from this channel after watching for almost a year… managed it in almost 2 hours 😅 resetting twice after silly mistakes. Just happy I was able to solve it haha

[@notonlyhuman6073]

Loved this puzzle! Still new to sudoku, so it took me nearly 50 minutes! I got the 4 in R1,C2 very early given the constraints in box 1, and that got me started at the top of the puzzle rather than the bottom. When I finally noticed the 7 vs 8 bit in row 9, that's when everything fell into place. Great setting, very relaxing solve.

[@langy2068]

That was rather fun. I don’t very often attempt most of these puzzles, but if I see a total video length of twenty-something minutes I know I can give it a jolly good crack. It’s nice to have an easy one once in a while. :-)

[@ShadowMarioid]

I did this same puzzle, loved it, and did it in almost the same way but took 80 minutes lol how fast he figured this stuff out is insane

[@Zhon66]

27:52 was my time. I'm so used to puzzles on this channel where there's only one real path to solve it, and my solve looks very similar to Simon's. This is a refreshing change of pace - you can really start the solve on just about any of the individual equations.

[@grahamhawes7146]

After entering a few ones I worked on the equatios from top tp bottom. It was interesting to se Simon tackle them bottom to top.

[@dVTHoR]

One of the most fun puzzles I’ve done. Did it in 55minutes but that counts a bathroom break and some spousal interruptions. Thanks for sharing this one!

[@KalikiDoom]

That is such a wonderful puzzle!

[@ilmgard1762]

22:21 This is the first time I solve the featured puzzle before watching Simon, and also finished faster the video length (still slower than the actual solve). I enjoyed this very much. I definitely have more confidence to try to solve puzzles myself if the video is less than 30 mins.

[@piarittersporn]

What a lovely puzzle. I enjoyed it so much. I started directly in r1, where there was only one possibility by maths without setting any other digit in any other cell before.

[@HenrikMyrhaug]

This puzzle has so many ways of solving it! I started by completing the 3 first arithmatic lines, then doing the rest of the arithmatic lines by sudoku, and then finishing the right side of the board by pure sudoku. Amazingly fun!

[@victoriarodriguez7155]

Really enjoyed this one

[@wigermiddelkamp8064]

21:32 for me. Really nice one, loved the ruleset, thanks for that!

[@deelkar]

After making a rather embarrassing error in calculating a simple sum and the following backtracking I managed it in 37:20. Quite nice idea, this!

[@tzeneth]

I did some bad math with the large 3 digit number and finally just whipped out the calculater ap :P

[@VeritasUnae]

I seem to have done the reverse of your track, Simon, in that I worked from the top to begin with, and then moved to the bottom. Got a good solve around 32 minutes long, very enjoyable to try while I was having dinner. Nicely set, mnasti2!

[@LixLorn]

REALLY enjoyed the first 99% of this puzzle. unfortunately then my brain took a holiday to australia or some such and I spent several minutes CONVINCED that 7x3 was 24, resulting in a deadly pattern in the row 8 sum and the end of row 5. I eventually asked a maths friend for help and they pointed out that 7x3 was 21, which was especially grating as I had been multiplying 21s to do the row 3 sum SIMULTANEOUSLY with trying to solve row 8, so. that kinda soured my on it at the last minute for something that was absolutely not your fault or mnasti2's. the puzzle was wonderful, I'd love more like it. the video was, as always, great. :)

[@davidalderson]

Really liked this one, completed the questions in a completely different order to Simon.

[@danielcamp789]

Was a bit daunted when I first took a look at this puzzle but it actually was reasonably approachable & ended up being a really fun solve. Great puzzle.

[@Terabiel]

For the first time ever, I have a time less than Simon. It will never happen again without another maths exam. Math based logic puzzles are clearly my jam: 9:11

[@isaacthek]

Took me 34 minutes while running around doing errands. Thoroughly enjoyable.

[@benallen1952]

First time solving a puzzle before watching a video was quite nice and very interesting watching you work from the bottom up when my thought process went top down.

[@KANPAI666OPPAI]

Pretty fun! Got 26:41, interesting how quickly you could rule out a lot of combinations based on given digits and little rules in arithmetic (e.g. you can't have 5 multiplied with something because that gives you another 5 in the line or 0).

[@unrealed]

I would love it if each week the puzzles got gradually harder as the week goes on. So Mondays would always be easy puzzles and Sundays would be the hardest (more or less, it's not an exact science). It would help the audience know when they can expect a puzzle of about their level

[@loxwjman]

Fantastic puzzle, took me just under half an hour, happy with that :)

[@brookkennedy212]

Enjoyed that one very much - very unique puzzle! 24 min for me!

[@Coldheart322]

kinda wish I had tried this, but my mind is not in a great place to think hard on solving sudokus right now. But watching the solve was wonderful. Thanks for yet another entertaining video.

[@kajacx]

Very cool puzzle, I'm glad I tried it myself.

[@BeastModeMaths]

Loved this puzzle and it was just the right difficulty for me.