The Impossible Puzzle 31 (Mensa IQ Test)
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- čas přidán 27. 08. 2024
- Puzzle 31 is one of the hardest puzzles on the mensa norway IQ test and for a long time I thought it was even impossible. I decided to make a video about the story from when I first encountered it to when it got removed from the IQ test.
Malkinky's video: • Puzzle 31 from Mensa I...
Mensa Norway IQ Test: test.mensa.no/
IQ test playlist: • The Impossible Puzzle ...
In this video I go through each of the puzzles and try to explain what the correct answer is and why.
Please let me know in the comments if you find interesting IQ Tests that you want me to check out!
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The Puzzles & Solutions channel will be dedicated to solving puzzles and other things similar to puzzles.
It was correct! Mensa typed it wrongly, it should be: Stripes + Stripes = White. White + Black = White. Black + Stripes = White. Black + White = Stripes. Stripes + Black = White. Black + White = Stripes. The middle is White ( Stripe + Stripes = White), and the left and right will be the same, so the answer is D.
The only confusing thing is how can A+B ≠ B+A. Most people won't think that way when they do the test.
Great video. Had the puzzle not had the error it would actually be pretty easy. It's not clear what the heck these puzzles are measuring. I get better at them the more I do, but my IQ isn't likely getting higher.
Exhaustive and entertaining, as always!
Don't know how to thank you enough! You gave my video a significant boost in the last 24 hours, that means a lot about your audience!
I'm still saddy about that pattern of mine, i was pretty attached to it just because i "figured it out" at first try, and B gave me a full score too! It looked so natural in my head, like if all 24 squares were tricking me outta finding that.
It would have been fun to hear honorable mentions like "victory royale on norway's national independence day coincidence" hahaha but i guess we'll keep in our happy memories.
Keep it up! You're great!
Yeah, Im like 95% sure that B gave me a full score as well?? Which made me even more confused about the puzzle, I went through the test multiple times both of picking B and not picking B but everytime i picked B I got a higher score.
I was thinking about mentioning that "victory royale on norway's national independence day coincidence" and a bunch of other things like my reddit post etc but I didnt want to make the video too long + I wanted to keep the main focus on just the puzzle solving and not so much all the history :P
Glad you enjoyed it tho :)
@@PuzzlesAndSolutions you're genius, good on your for insisting on explaining the logic.
Holy shit, what a saga! Indeed, if you do vertical addition only, and neglect to think that it should work the same horizontally as well, you'll get the indended correct solution. But if you try the same addition horizontally, it'll produce a different result, throwing off your train of thought, leading you to start overthinking this thing and wasting time on it. So it's a matter of luck if you solve it quickly, that luck would be choosing to do the vertical addition first.
answer to new exercise is D.
That was certainly a relief to get some closure.
Idk if this is just a coincidence, but you can just take the middle from the top ones and put it as the sides on the lower ones. Then you keep white in the middle for all of them. So for example looking at the first vertical row top picture , there is white in the middle, therefore there are two white edges on the lowest one in that same row.
I did this as well !
A flawed test is a nightmare for me. I did the test today and it was really easy for an IQ test, I'm gonna book an IQ test sometime next year, I hope that my IQ is 145+ as the online test seems to suggest, though I'll be doing the Swedish physical Mensa test.
Let me know how it goes when you finally do it :P
This is a Wechsler scale if you pay attention ro percentiles... That means that your IQ is over 172+ on Cattel scale, aka. the scale that assumed that Einstein's IQ was 160. Don't stress about it, the test is according to many people unable to even calculate the whole logic inteligence, because of the complexity of human brain. Scoring significant result means that you are good at matrices and is sometimes correlated to math in some aspects of it. Also your sleep, nutrition, stress and environmental conditions also affect your performance. At the test I was able to attain 144 on Cattel scale despite the lack of sleep and really hot 35C inside the classroom, where the test was taken. After that I assumed that in perfect conditions I would attain 150 without problems, but at the mensa online practice tests of Norway and Finland I managed to get 138 (162 Cattel). IQ tests can also be practiced and if practiced, they often show higher results by 20 points.
@@amarimamovic8695 Oh, thanks for telling me. I did the test when I was playing a game on my xbox with my phone on my lap but idk if I was in stress or anything, actually I think the game helped me calm down a lot.
@@i_have_no_pronouns7037 how did you do? (if you are willing to share)
@@quarepercutisproximum9582 I never actually got around to book the test cause I realised that I didn't care and probably wouldn't want to know. The truth is IQ is somewhat important, but knowing your IQ could lead to limitations and life changing decisions. I don't want my IQ to choose my future, I just want to work with the thing I'm most interested in. Plus I have a lot of self confidence when it comes to my grades and "smartness". I suggest that you also avoid the test entirely, even the online, cause it might lead to confidence issues in the future and you might end up blaming everything on your IQ.
my solution:
black + black = white and grey + grey and white + white = white
grey + white = grey
grey + black = grey ( we dont need this)
so just from left to right or from top to bottom:
white + grey = grey
white + white is white
so it just can be d
I remember solving it tho... For me I looked at it this way. The first row has 3 of all 3 types W S and B, the second row has 5 of S and 2 each of B and W, the third row already has 4 W so that means that the final answer should have 5 W in total 2 S and 2 B but the answers didn't have any option that would allow this to happen since this would require 2 B and 1 W types. So from the options that contain 1 W squares I chose the one which would follow at least some pattern which would be (b) as this would mean that the no. of B types decreases by one in each row maintaining the count of W types.
It took me less than a minute but you solve puzzels I don't even want to try.
wowww.. i literally was puzzled seeing mensa ppl answer- its just additon . even i did the same lol.. at first i was disappointed think what an loser i am 😂😂 but i saw till the end... and i was satisfied
The replacement item is 100x easier less gooo
Thank you this had us troubled 🙂
Finally! Other videoo
i got answer F. first row two striped squares middle con and alternative white. row 2; 2 black squares middle con alternative stripped. and finally 2 white middle con alternative black; leaving primarily F.
Wow, so it was D after all. It was my first instinct, and the only one that made logical sense to me. But then I wonder, how come you got extra points for choosing B?
maybe blacks had a pattern too
Yes, that was it. Follow the vertical pattern of every third square
Using logic you can tell it has symmetrical which means it's either D,A or F. It cannot be A because if it is A then there would be no pattern. So it's either D or F.
To be honest, it was easily solvable even with 2 Blacks having dual outcomes.
The trick was to only look at combinations of Stripes and Whites and ignore Black squares. This makes sense as most of the time the test designers can throw in random items in questions Only to distract you from finding the real pattern.
So if you had only looked at Whites & Stripes, it would have been evident that correct answer can only be D.
Does anyone know what would be the next number in this sequence: 1, 0, -1, 0 ?
I'd say one but i dont think the puzzle makes that much sense
I went through this sequence in the Mensa New Zealand video. I found two ways to think about this sequence:
-If you are familiar with trigonometry; The n-th number in this sequence equals sin(n*90 degrees).
f(1)=sin(90 degrees)=1
f(2)=sin(180 degrees)=0
f(3)=sin(270 degrees)=-1
f(4)=sin(360 degrees)=0
f(5)=sin(450 degrees)=1
-If we look at the change between the 3 first numbers we see that it's "minus 1" two times in a row so we can make the assumption that any change repeat 2 times. Going from the third to the forth numbers we have "plus 1" and if we repeat "plus 1" another time, we get that the answer=0+1=1.
@@PuzzlesAndSolutions Thank you so much. I have to admit I usually skip over the first few questions of your videos, didn't realize you had already explained it (I was confronted with this puzzle in the Mensa Germany test). Thanks for taking the time to explain, your reasoning makes a lot of sense. Also, I want to thank you for all the effort you put into your videos (with tracking down the right solutions to impossible puzzles and taking the time to explain the hard ones graphically). Wish you all the best
@@hjkhjl67t I normally don't care much about the easier puzzles either and I have thought about making videos with only hard puzzles from tests.
The only problem with making videos about "hard puzzles" is knowing if a puzzle is objectively hard or not. For example there might be some puzzle on an IQ test that a lot of people could use help with BUT I personally found that specific puzzle easy and therefore I never made a video about it.
or the opposite scenario where I found a puzzle really hard but the majority of people find it easy and I waste my time explaining something that is obvious to most...
Also thank you for the compliments, I try to become gradually better at explaining the puzzles such that as many people can understand :)
The one with a line in between and black and white cubes I just couldn't understand on the Norway test
In the end I got 138
exercise 29?
@@PuzzlesAndSolutions Yes that one
People answer the questions, then their capabilities are measured against the answers they gave, if giving a particular answer can be proven beyond reasonable doubt to be a predictor for someone's learning ability, then it is included in a question. The correct answer is simply what the most capable people give. I.e., The logic came after the question, it's just the result of trial and error, empirical evidence, it's important not to conflate causation and effect.
Rows going up and down, and diagonal left to right. S+S=W. S+B=W. S+W=S. W+B=W. W+S=S. W+W=W. B+W=S. B+W=S. There is no B+B. Correct answer is SWS.
i still don't understand the solution at 13:22 you have the solution given from the creator of the puzzle and it clearly says Black+black= white and then says Black+black=stripped. how is this possible? i can't be the only one that noticed
This is dealt with literally 10 seconds later 😂
How did they say black plus black equals white and also black plus black equals black?
They probably just typed it out quickly and didnt notice :P
I got the autism + adhd pattern recognition thing going on and wasn't able to get this during the test (still mensa level tho), but pausing the video and looking at it again, I figured it out in 5 minutes. My method is probably bs and I probably just got lucky looking it over this second time. But the middle cube in the top row shows up as the left and right cubes of the second row if you shift it to the right and take the former right section and put it on the left. Then the middle cubes in the top row also make up the outside cubes in the bottom row, but without having to shift it to the right as done in the second row. So since D was the only one that had a diagonal striped cube on the right and left side, since the top right section has a diagonal striped cube in the middle, I guessed that one.
oopps i didn't watch to the end and tried to solve it with the information before i saw that others noticed too. he says the puzzle can still be solved but how?
I think it's D
IMHO this puzzle holds the water pretty well, how about that ?:
1. screen out (hide) blacks
2. now you can see only 2 simple rules: a) stripes * stripes = white b) white * stripes = stripes
so, you've got just one possible answer: "D".
my only doubt is that it seems to be too simple taking into account relatively high number of this puzzle and scale of discussion around it.
very easy.
Answer D.
I thinking correct variant is F
it's not a math problem rather it is just question how fast can you see variations and selcect apporiate like thinking process in like chess or damme as a simple version. why did they go to hard ways themselves. I also simply found white+gray in rank and column.
well if you look for consistent logic in that test. Then that iq test require more iq lol
Bror hva fikk du i engelsk
It's A.
A possible way is A
Lol this ez. As you notice there is some counting with the patterns you have a three stacker on middle row. You can just count that you have the same order on what ever the hell would be the right answer. Then you are stuck with D & F, possibly A. For fuks sake, enter 12 seconds more solving and see stripes stripes equals white. We made it bros. It's D) Don't overthink.
Other one could be D
i solved this in 30 seconds
Same
Is 31 Hard LoL 😂😂
E
Answer A can be made to work too, this is a poorly designed puzzle.
Could you elaborate?
@@disfiguredirl663 yeah I will l8r, ....work commitments.
Hey Mate, sorry it's taken so long, I'll get to it next time I have some time to myself. 🙂👍
LOL BRO IS THIS A JOKE WTF
😂😂😂😂😂😂😂😂😂😂😂omg
the solution of the one in the thumb-nail that is on the right is < d > though, isn't it? ...there ain't no talks in the clip on this one just mentioned so I thought to insert the solution here...
Le p'tit Daniel
10 S, 9 w, 5B (+3).
SSS1 WWW1 ?
BBB= A
10S, 9W, 8B in total.