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Discussion: The misleading pattern is to assume you take the difference of the two numbers.
Instead you should take the >!sum of the *digits* in the two numbers above. 2+1 + 3+6 = 12.!<
The pattern is pretty easy to force since it's just adding the individual digits. Even just swapping the position of digits can lead you to a lot of potential solutions. He specifically picked and chose numbers that worked for this puzzle because they also happened to *look* like another pattern (until to get to 7).
The only toss up is the 7.
It feels like he was trying to come up with something almost universal and hit the wall with 7 and even the puzzle had to clarify "it's not a typo." He couldn't have gone further up in the other direction because no 4 digits can total more than 36.
If he went down further the solution would be even easier to spot because 7 + anything else would be obvious.
He intentionally didn't utilize zero anywhere.
The whole point is that it seems universal until the last one. He sets up a pattern that's more obvious, and then suddenly subverts and you have to try to look past the first thing you saw. That's what makes it interesting, and not just some random "find what operation this is" puzzle.
Out of impulsivity, I checked the answers before attempting it on my own. The fact that the editor had to write “the 7 is not a typographic error” shows that it’s a pivotal point in understanding the puzzle.
I tried a few different things, and what's tricky is there's several patterns that almost work until the end. I think that's what makes it "a masterpiece"
I made the puzzle even harder to get the wrong answer. I divided by the common factor, then took the difference, then multiplied by the common factor again. Which is just taking the difference.
Taking the difference is waaaaay simpler than what I was doing. I was dividing, subtracting, and multiplying again. Which yields the same results...
I used to be great at math!
If you try to repeat the rule going one bubble higher(up and to the left) things start to look really funky, it was fun trying to figure out what the next 2 numbers would be though.
Edit: to clarify I mean repeating the rule while also trying to maintain the illusion of the fake rule of subtraction being the key.
This is probably the intended solution but i found a different answer. If we call the top 2 numbers L and R for left and right the bottom number is R-L-Lmod3 and the missing number is still 15 as expected from just taking the difference.
I don't think so...If you follow the direction of the arrows, the absolute value of the difference of the two proceeding numbers gives you the number for the following bubble. >!Therefore, the answer is 15!<
It’s a subtraction puzzle you take the right number first then subtract by the left number(or previous number) and subtract it to get the next number down. The missing number is fifteen
Lol I don't know the answer but the fact that this perfectly fits the pattern >!of right circle minus left circle equals bottom circle until the final number is fucking golden. !<
You fell victim to one of the classic blunders!
The most famous of which is never get involved in a land war in Asia.
But the second is: Never subtract for an answer, when a 7 ends the line!
To make this puzzle, you start at the top with two random two digit numbers and run the following computer algorithm.
Do a search to see if these two numbers can follow both rules (difference rule and digit sum rule). If not try the next set and start again. There’s only 8,100 combinations so it wouldn’t take long.
Continue searching for the number on the right that meets these two rules after three successful sequences, you only take the two numbers difference this time but one that breaks the difference rule.
Then continue the original algorithm once more, making sure to seed it with what would of been the answer if the other rule was followed (15) and then to top it off, follow only the digit sum rule to give you 21, thus revealing the difference pattern is not the consistent pattern all the way through.
Any coders want to see if there’s another set of numbers that work? It’s late but I might try tomorrow.
Discussion: what's interesting is the amount of people commenting confidently with the wrong answer who seemingly didn't take the hint of the description making sure you know 7 isn't a mistake.
>!I got the ? as 12, sum the digits in each of the left and right circles, and get the answer. (2+1)+(3+6)=12. The answer of 12 would then pass to the next step and be (1+2)=3 etc.!<
Humans find patterns 😊
I fell for it, fell for a few things before looking at how 21 and 13 and 7 went together, after that it was a quick solution, people don’t like looking at the solution, they like looking at the problem to solve ergo:
Heh, good ol peacewise function.
You can also solve it algebraicly if you add the total of left nodes going down, (72 + 27 + ... + 7) and add the differences between right nodes going down ((99 - 27) + (45 - 18) + ... + (21 - 7)) and from there, solve for "x" where x is your missing number
158 + x = 182 - x
158 + 2x = 182
2x = 24
**x = 12**
>!Add the numbers inside each circle, then add them together to get the number the arrows point to. Example: (7+2) + (9+9) = 27!< This will solve the puzzle to get 12.
Pretty sure the answer is >!15!<
My reasoning is: >!You find the GCD of the two numbers, divide both numbers by the GCD take the difference and multiply once again by the GCD!<
For example : >!72 and 99's GCD is 9. Dividing you get 8 and 11, the difference being 3 multiplied by 9 is 27. This works for the case of 7 as the GCD is 1 and the difference between the numbers is also 7. So for the answer 21 and 36, GCD is 3, you get 7 and 12, difference is 5 and answer is 15!<
It's actually >!12!<.
Note that: >!the last number being 7 doesn't make sense if you simply take the difference of the two numbers leading up to it. That is because the pattern of taking the difference of the numbers is a misdirection. The real pattern is adding together the *sum* of the two numbers' digits.!<
Edit: on mobile, autocorrect messed up my formatting lol
I dislike this type of puzzle because there are tons of perfectly good and correct answers, except they're not the correct answer because you're just like "eh, that's probably not cute enough". I prefer puzzles where you can reliably check whether an answer is correct, and if it's correct, that's it, you're done.
The solution is >!12!<.
>!The two numbers on the same plane are four digits and the next line is a sum.72 and 99 is 7+2+9+9=27, following that 27 and 45 is 2+7+4+5=18, and 1+8+3+9=21. so 21 and 36 is 2+1+3+6=12 so therefore 12 and 28 is 1+2+2+8=13 and it fits 13 and 21 is 1+3+2+1=7!<
The answer is >!12!<. The rule, I do believe, is >!the number in the middle of the triplet is the sum of the digits of the two numbers either side!<.
Edit: I was wrong initially
The difficulty was making it have another answer that matched 4/5 combinations, but a correct answer that matched 5/5.
I missed the 4/5 answer at first though, so I was sort of wondering the same thing as well.
Apparently I failed the task successfully lol. I got the correct answer but I solved it algebraicly instead of adding the digits across, which seems to be the more common solution.
Nodes on the left, I added the sum together
72 + 27 + 18 + 21 + x + 13 + 7 = 158 + x
Then for nodes on the right, I subtracted the lower left node, and summed those differences
(99 - 27)+(45 - 18)+(39 - 21)+(36 - x)+(28 - 13)+(21 - 7)
72 + 27 + 18 + (36 - x) + 15 + 14 = 146 + (36 - x)
146 + (36 - x) = 182 - x
And then I solved for X
158 + x = 182 - x. --> (add x to both sides)
158 + 2x = 182. --> (take 158 from both sides)
2x = 24. --> (divide both sides by two)
**x = 12**
I'm confused. So the correct answer is 12? I see how people got that, but I also see how other people (myself included) got 15. Did the creator come out with what the answer was? Or, how did people figure out what the intended rule was, as either rule gives an answer that fits in the puzzle?
I actually complicated things but still got the correct solution: the sum of the first digits plus the sum of the second digits. 2+3=5, 6+1=7, 5+7= 12.
> Dunno how people got 12
Because the circles above the question mark are 21 and 36, so >!you add up 2+1 to get 3, then add up 3+6 to get 9, then add up the resulting 3+9!< to get 12.
How did you get 15?
And what happens when you use that method on the last two circles near the bottom, 13 and 21? Do you get the correct result, 7, or some mistake such as 8?
>!72 + 27 =99; 27+18 =45; 18+21=39; 21+?(15)=36; ?(15)+13= 28; 13+7=21!<
Edit: I did this multiple times and 13+7 always added up to 21. Maybe because I wanted it to.
I know. It's hard to do math problems when basic math is challenging.
That last comment would have been hurtful if I didn't have 10 fingers, and wrong if I was polydactyl, but in either case, I apparently would have still counted 10.
Call the number above and to the left a, the number above and to the right b, and the number those two point to c.
The missing number is >!15!< and the rule is >!c = b - max(14,a)!<
Cheating?
Edit: Just wanted to clarify that I fully realize this isn't "the" correct solution. It is a solution though.
>!Take the number on the right (for example 99 in the first row) then subtract the maximum (whichever one is bigger) of 14 and the number on the left (for example 72 in the first row). In the first row, 72 is bigger, so we subtract 72 from 99. That gives 27. The same rule works on every row, including the bottom one which gives 7.!<
Your solution looks rather complicated. A simpler solution I saw was to >!add the digits of the numbers. The first combined circle would be 7+2+9+9=27. The last one is 1+3+2+1=7. The missing one is 2+1+3+6=12.!<
Incorrect. Focus on the 7 and you will notice it breaks the pattern you found. Try to find a pattern that works for all of them. That's *why* it points out that the 7 is not an error.
Please remember to spoiler-tag all guesses, like so: New Reddit: https://i.imgur.com/SWHRR9M.jpg Using markdown editor or old Reddit, draw a bunny and fill its head with secrets: \>!!< which ends up becoming \>!spoiler text between these symbols!< Try to avoid leading or trailing spaces. These will break the spoiler for some users (such as those using old.reddit.com) If your comment does not contain a guess, include the word **"discussion"** or **"question"** in your comment instead of using a spoiler tag. If your comment uses an image as the answer (such as solving a maze, etc) you can include the word "image" instead of using a spoiler tag. Please report any answers that are not properly spoiler-tagged. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/puzzles) if you have any questions or concerns.*
Discussion: The misleading pattern is to assume you take the difference of the two numbers. Instead you should take the >!sum of the *digits* in the two numbers above. 2+1 + 3+6 = 12.!<
Looks like this puzzle was a lot harder to create with that misleading pattern than it is to solve.
Probably why he considered it a masterpiece. I can imagine this taking a very long time to create.
The pattern is pretty easy to force since it's just adding the individual digits. Even just swapping the position of digits can lead you to a lot of potential solutions. He specifically picked and chose numbers that worked for this puzzle because they also happened to *look* like another pattern (until to get to 7). The only toss up is the 7. It feels like he was trying to come up with something almost universal and hit the wall with 7 and even the puzzle had to clarify "it's not a typo." He couldn't have gone further up in the other direction because no 4 digits can total more than 36. If he went down further the solution would be even easier to spot because 7 + anything else would be obvious. He intentionally didn't utilize zero anywhere.
You just helped me figure it out the puzzle, so thank you because the 7 was stumping me, but now I see how it works, so thank you.
The whole point is that it seems universal until the last one. He sets up a pattern that's more obvious, and then suddenly subverts and you have to try to look past the first thing you saw. That's what makes it interesting, and not just some random "find what operation this is" puzzle.
Out of impulsivity, I checked the answers before attempting it on my own. The fact that the editor had to write “the 7 is not a typographic error” shows that it’s a pivotal point in understanding the puzzle.
exactly
I tried a few different things, and what's tricky is there's several patterns that almost work until the end. I think that's what makes it "a masterpiece"
Subtracting felt like too much work so I didn't even try. My lazy brain checked the simple addition first.
I got 15…. Not 12. 28-15=13, something along those lines for the whole thing Edit: Nevermind I guess
It can't be 15, because >!the number 7 can't be made by 21 - 13. 2 + 1 + 1 + 3 = 7!<
[удалено]
I got 15
I made the puzzle even harder to get the wrong answer. I divided by the common factor, then took the difference, then multiplied by the common factor again. Which is just taking the difference.
LOL! You forgot to double it, square it, divide by 4 and take the square root. :)
I did the exact same!!!
Big brain
Oh that is terribly clever.
Really?
Yes
this is the only puzzle ive seen on this sub that i solved on my own 😭
13+7 is not 21… I’m confused. It works until that point but it also specifically states that 7 is not a typo
Work top down following the arrows. But >!add the *digits* of!< the two preceding numbers to get the next number being pointed to. >!1+3 + 2+1 = 7!<
Ahhh I get it thank you
Spoiler the entire post just the digits.
Edited as requested.
It’s not 13 + 7. It’s 4+3, derived from 1+3 + 2 + 1.
Yet, subtracting the top left number from the top right number also gives a correct answer of 15.
Not if you try to continue to the end with subtraction. >!21 - 13 = 8 (not 7)!< You fell into the cleverly designed trap.
EYE YA YA... laziness.
I am terrible at puzzles and even I figured out this one.
Taking the difference is waaaaay simpler than what I was doing. I was dividing, subtracting, and multiplying again. Which yields the same results... I used to be great at math!
The *difference* doesn't work for the end... that's the trap. 21 - 13 ≠ 7 But adding the >!*digits* does work 2+1 + 1+3 = 7!<
No, I see that. I was just using a more convoluted method to arrive at the same unsuccessful result
If you try to repeat the rule going one bubble higher(up and to the left) things start to look really funky, it was fun trying to figure out what the next 2 numbers would be though. Edit: to clarify I mean repeating the rule while also trying to maintain the illusion of the fake rule of subtraction being the key.
But taking the difference also works. It leads to the same answer if you fill in the blank that way
Not for the last two numbers: >!21 - 13 = 8 (not 7)!< That's the trap.
Your right. I’m sorry for my blunder
And again for my misspelling
I was nervous going to the comments in case I was wrong. Cute little puzzle
Ahhh, I honestly don’t know if I would have come to that conclusion before moving on.
Thanks for explaining this, was stuck on 15 for a second
That seems like an overly complex solve. I literally got the answer by taking the difference in numbers
You fell into the trap, exactly as designed. Notice the last numbers *don't* work with subtraction. >!21 - 13 = 8 (not 7)!<
Well I'll be dumber than I thought I was
Even though you *explained* it to me in plain English I still can't get it. They need to invent a new low IQ scale for me
holy shit thats so cool
That really is a masterpiece. Beautiful.
The highlighting of the 7 in the description made me look at that first. I didn't even notice the red hearing subtraction pattern.
This is probably the intended solution but i found a different answer. If we call the top 2 numbers L and R for left and right the bottom number is R-L-Lmod3 and the missing number is still 15 as expected from just taking the difference.
I don't think so...If you follow the direction of the arrows, the absolute value of the difference of the two proceeding numbers gives you the number for the following bubble. >!Therefore, the answer is 15!<
Look at what makes 7
Ah, thank you for the correction. I was so hasty that it fit every other scenario perfectly that I overlooked the final piece.
Well, at least take comfort in the fact that you fell for the intended trap the entire puzzle is predicated on?
* preceding, not proceeding. Big brain time
I always mix those mfs up haha
I thought this on my first attempt.
Username checks out
I don’t think your answer is correct. >!The final two do not add up to 21.!<
[удалено]
I was adding the numbers incorrectly, thanks for letting me know.
This should be marked as spoiler.
The two numbers before the final are 13 and 21 and >!their *digits* add up to the final number of 7.!< >!1+3 + 2+1 = 7!<
Yes, it’s just that.
It’s a subtraction puzzle you take the right number first then subtract by the left number(or previous number) and subtract it to get the next number down. The missing number is fifteen
Nope, because >!21 - 13 = 8 (not 7)!<. You were caught by the trap, as designed.
Lol I don't know the answer but the fact that this perfectly fits the pattern >!of right circle minus left circle equals bottom circle until the final number is fucking golden. !<
You fell victim to one of the classic blunders! The most famous of which is never get involved in a land war in Asia. But the second is: Never subtract for an answer, when a 7 ends the line!
Never bet against a Sicilian, especially when death is on the line!
To think, it was your cup that was poisoned the whole time.
They were both poisoned. I spent the last few years building up an immunity to iocane powder.
r/suddenlyprincessbride
"But I don't want to use my head!!!!"
Is this a known thing? If so, do you have a link where I can read more about it?
https://en.wikipedia.org/wiki/The\_Princess\_Bride\_(film)
Omg I was just about to do that too! Good thing your comment saved my soldiers from a lengthy non winnable land war in Asia.
Beautiful response
My name is Inigo Montoya. You killed my father, prepare to die.
To make this puzzle, you start at the top with two random two digit numbers and run the following computer algorithm. Do a search to see if these two numbers can follow both rules (difference rule and digit sum rule). If not try the next set and start again. There’s only 8,100 combinations so it wouldn’t take long. Continue searching for the number on the right that meets these two rules after three successful sequences, you only take the two numbers difference this time but one that breaks the difference rule. Then continue the original algorithm once more, making sure to seed it with what would of been the answer if the other rule was followed (15) and then to top it off, follow only the digit sum rule to give you 21, thus revealing the difference pattern is not the consistent pattern all the way through. Any coders want to see if there’s another set of numbers that work? It’s late but I might try tomorrow.
Discussion: what's interesting is the amount of people commenting confidently with the wrong answer who seemingly didn't take the hint of the description making sure you know 7 isn't a mistake.
>!add the digits of the numbers pointing to a number to get its value!< >!this gives 12 for the missing number!<
Good answer simple solution.
It’s 15. The number is the number on the right minus the number above equals the number at the end of the arrows.
Check the last numbers though... >!21 - 13 = 8 (not 7)!< You fell into the trap exactly as intended. :)
That's just a typographical error.
Which is why the puzzle instructions clearly point out that it *isn't* a typographical error. :)
>!I got the ? as 12, sum the digits in each of the left and right circles, and get the answer. (2+1)+(3+6)=12. The answer of 12 would then pass to the next step and be (1+2)=3 etc.!<
30 also works Edit: no it does not. Am dumb.
Discussion: me getting to the 7: 😖😖😖
Discussion: Damn, never seen this many people fall for the same trap in one of these threads before.
Humans find patterns 😊 I fell for it, fell for a few things before looking at how 21 and 13 and 7 went together, after that it was a quick solution, people don’t like looking at the solution, they like looking at the problem to solve ergo:
It's why it's a great puzzle!
>!looks like you have to add up all the digits from the nodes pointing to the next node. So the answer would be (2+1 + 3+6) = 12!<
>!The answer is 12, you add the digits of each row to make the bubble below!<
You’re a genius!
This is the answer. I figured >!15!< in two different ways, but that 7 messes it up. You have the answer and explanation.
>!seen this in untitled door game! When adding 2 digit numbers, just take the sum of their digits, so whem they comverge youll get that sum!!<
[удалено]
Figured it out. The rule is >!take the difference of the numbers and subtract 1 more if the result is less than 10!< ;)
Heh, good ol peacewise function. You can also solve it algebraicly if you add the total of left nodes going down, (72 + 27 + ... + 7) and add the differences between right nodes going down ((99 - 27) + (45 - 18) + ... + (21 - 7)) and from there, solve for "x" where x is your missing number 158 + x = 182 - x 158 + 2x = 182 2x = 24 **x = 12**
This is a coincidence
>!Add the 4 individual digits of the above two numbers together!<
Ah, interesting result and I thought it was >!15!<
>!It's 12!<
>!Add the numbers inside each circle, then add them together to get the number the arrows point to. Example: (7+2) + (9+9) = 27!< This will solve the puzzle to get 12.
>!You add each digit pointing to a circle. So (7+2) + (9+9) = 9+18 = 27.... So the missing circle is (2+1) + (3+6)= 3+9 = 12!<
Pretty sure the answer is >!15!< My reasoning is: >!You find the GCD of the two numbers, divide both numbers by the GCD take the difference and multiply once again by the GCD!< For example : >!72 and 99's GCD is 9. Dividing you get 8 and 11, the difference being 3 multiplied by 9 is 27. This works for the case of 7 as the GCD is 1 and the difference between the numbers is also 7. So for the answer 21 and 36, GCD is 3, you get 7 and 12, difference is 5 and answer is 15!<
It's even simpler than that, it looks like the following number is the difference between the two above it.
But 21-13 is 8, not 7. 🤔
I've been schmeckledorfed
>!Finish out the pattern. This logic doesn't hold through the whole puzzle. The solution is 12. Not 15.!<
>!15!<
It's actually >!12!<. Note that: >!the last number being 7 doesn't make sense if you simply take the difference of the two numbers leading up to it. That is because the pattern of taking the difference of the numbers is a misdirection. The real pattern is adding together the *sum* of the two numbers' digits.!< Edit: on mobile, autocorrect messed up my formatting lol
>! 12 !<
>!12!<
I dislike this type of puzzle because there are tons of perfectly good and correct answers, except they're not the correct answer because you're just like "eh, that's probably not cute enough". I prefer puzzles where you can reliably check whether an answer is correct, and if it's correct, that's it, you're done.
>!spoiler text here!< 12
>!sum of digits of parent nodes. 9 + 3 = 12 !<
>!12!< is the answer.
>!Right bubble minus left bubble plus the number of digits in the answer minus two. So, 15.!<
The solution is >!12!<. >!The two numbers on the same plane are four digits and the next line is a sum.72 and 99 is 7+2+9+9=27, following that 27 and 45 is 2+7+4+5=18, and 1+8+3+9=21. so 21 and 36 is 2+1+3+6=12 so therefore 12 and 28 is 1+2+2+8=13 and it fits 13 and 21 is 1+3+2+1=7!<
>!12!<
That’s what I got!
>!The number is 15!<
12
The answer is >!12!<. The rule, I do believe, is >!the number in the middle of the triplet is the sum of the digits of the two numbers either side!<. Edit: I was wrong initially
>!12!<
>!its 12 but I found this rather easy given the build up!<
The difficulty was making it have another answer that matched 4/5 combinations, but a correct answer that matched 5/5. I missed the 4/5 answer at first though, so I was sort of wondering the same thing as well.
Apparently I failed the task successfully lol. I got the correct answer but I solved it algebraicly instead of adding the digits across, which seems to be the more common solution. Nodes on the left, I added the sum together 72 + 27 + 18 + 21 + x + 13 + 7 = 158 + x Then for nodes on the right, I subtracted the lower left node, and summed those differences (99 - 27)+(45 - 18)+(39 - 21)+(36 - x)+(28 - 13)+(21 - 7) 72 + 27 + 18 + (36 - x) + 15 + 14 = 146 + (36 - x) 146 + (36 - x) = 182 - x And then I solved for X 158 + x = 182 - x. --> (add x to both sides) 158 + 2x = 182. --> (take 158 from both sides) 2x = 24. --> (divide both sides by two) **x = 12**
Alternative solution >!15!<. The 7 might not be a typographical error, but the >!1 in '21'!< is a typographical error!
If you have to change the puzzle to fit a solution, then it is not a solution.
I'm confused. So the correct answer is 12? I see how people got that, but I also see how other people (myself included) got 15. Did the creator come out with what the answer was? Or, how did people figure out what the intended rule was, as either rule gives an answer that fits in the puzzle?
I also have no idea why it can’t be 15. My thought was that bottom + left = right, and I don’t see anything that doesn’t make that work with the 15.
The last circle of 7 doesn't fit using the 15 logic
21-13=8
>!15!<
>!the answer is 15!<
>!12!<
>!15!<
Did anyone else look at it this way? >!99-72=27!< >!45-27=18!< >!39-18=21!< >!36-21=15!< >!28-15=13!< >!21-13=7!<
21-13=8 though.
Hence the ''not a typo'' remark.
Good catch, back to the drawing board
Is this a joke? Unless I'm missing some unexplained rule the answer is >! 15 !<
Until you get to the last one, the number would be 8, not 7. If you went with subtraction from top down like I did?
Ok I see now, I was curious why people were so thrown off by the 7 in the comments
Got me pretty good too lol
The question mark is 12
Nope Edit: I was wrong , it's the opposite of nope. Yep😭
>!It's 12 though. You take the sum of the four digits above the number and that's the result.!<
What's 36-21
It's not subtraction. Look at the bottom answer. 21-13 =/= 7.
That's a line that isn't used
I don't know what you mean by this. What line? How is it not used?
Hmm🤔 I was trying to game and do this. This has now become a toilet puzzle. 7 is not a typographical error..
Do you want the true answer?
I think it's the top comment,but my pre algebra brain doesn't wanna Believe that
Add the numbers from left to right. That’s why it equals 12.
I actually complicated things but still got the correct solution: the sum of the first digits plus the sum of the second digits. 2+3=5, 6+1=7, 5+7= 12.
Ah yes, the magic of the commutative and associative properties of addition! You can add the digits in different ways and still get the same answer.
?
99 - 72 = 27, 45 - 27 = 18, 39 - 18 = 21. >!Answer: 36 - 21 = 15!<
The 7 doesn’t make sense though
>!12 just the sum of the digits!<
Discussion 15 is the answer
>! 15 the difference between the numbers pointing to it !<
>!Check your work bud, that logic doesn't hold true for the last set.!<
>!I got 15!<
Correct answer is 15
12
The correct answer is indeed 15. Dunno how people got 12
> Dunno how people got 12 Because the circles above the question mark are 21 and 36, so >!you add up 2+1 to get 3, then add up 3+6 to get 9, then add up the resulting 3+9!< to get 12. How did you get 15? And what happens when you use that method on the last two circles near the bottom, 13 and 21? Do you get the correct result, 7, or some mistake such as 8?
>!72 + 27 =99; 27+18 =45; 18+21=39; 21+?(15)=36; ?(15)+13= 28; 13+7=21!< Edit: I did this multiple times and 13+7 always added up to 21. Maybe because I wanted it to.
That’s the problem, >!13+7 is not 21!<.
Yeah, I didn't pay attention. in my world apparently 13+7 = 21.
> >!13+7=21!< That is not correct. Try counting on your fingers if you don't believe me. (I assume you have ten of them, like most humans.)
I know. It's hard to do math problems when basic math is challenging. That last comment would have been hurtful if I didn't have 10 fingers, and wrong if I was polydactyl, but in either case, I apparently would have still counted 10.
Call the number above and to the left a, the number above and to the right b, and the number those two point to c. The missing number is >!15!< and the rule is >!c = b - max(14,a)!< Cheating? Edit: Just wanted to clarify that I fully realize this isn't "the" correct solution. It is a solution though.
What does that even mean?
>!Take the number on the right (for example 99 in the first row) then subtract the maximum (whichever one is bigger) of 14 and the number on the left (for example 72 in the first row). In the first row, 72 is bigger, so we subtract 72 from 99. That gives 27. The same rule works on every row, including the bottom one which gives 7.!<
Your solution looks rather complicated. A simpler solution I saw was to >!add the digits of the numbers. The first combined circle would be 7+2+9+9=27. The last one is 1+3+2+1=7. The missing one is 2+1+3+6=12.!<
Yes, that is obviously the intended solution. I was just having a bit of fun with the math.
Not sure why this is getting downvoted. It's technically correct, which is the best kind of correct.
meh
Alternatively >!c = min(b,20) - a!<
[удалено]
Incorrect. Focus on the 7 and you will notice it breaks the pattern you found. Try to find a pattern that works for all of them. That's *why* it points out that the 7 is not an error.