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Post by Elizabeth on Sept 29, 2017 7:32:25 GMT
Can you solve this math riddle? Took me like a minute to figure out what these tricksters did. Two possible aswers here.
1 + 4 = 5
2 + 5 = 12
3 + 6 = 21
8 + 11 = ?
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Post by Sarmatian on Sept 29, 2017 8:03:47 GMT
8 + 11 = 96
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Post by Elizabeth on Sept 29, 2017 8:04:55 GMT
That's one answer! Anyone know the other answer? I found the other answer first actually. Sarmatian went the opposite route  |
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Post by Sarmatian on Sept 29, 2017 8:08:36 GMT
Other one would be 99
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Post by Elizabeth on Sept 29, 2017 8:09:34 GMT
Unless there are 3 answers...how did you get 99? |
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Post by Sarmatian on Sept 29, 2017 8:16:13 GMT
Unless there are 3 answers...how did you get 99?
Scratch that it's wrong.
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Post by Puritan Benedict on Sept 29, 2017 19:19:44 GMT
Result is 40.
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hamad
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Post by hamad on Feb 5, 2018 6:03:10 GMT
1 + 4 = 5
2 + 5 = 12
3 + 6 = 21
8 + 11 = ?
the operation seems to be a+b = a*(1+b)
1+4=1*5=5
2+5 = 2*(5+1)=12
3+6=3*(6+1)=21
8+11=8*12=96
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HecticThinker
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Post by HecticThinker on May 2, 2018 12:15:35 GMT
I'd go with 96 as well, with the same reasoning as hamad.
Trying to figure out the other option now....
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HecticThinker
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Post by HecticThinker on May 2, 2018 12:27:38 GMT
And the other answer is probably 40. I think this one it more "correct" though. It doesn't presume anything at all.
A very nice little riddle really.
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Deleted
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Post by Deleted on May 2, 2018 14:01:29 GMT
40, the answer is always equal to the sum of the previous answer two sequence and the addition in progress
So 2+5= 12, because 1+4 =5, 2+5=7 so 7+5=12.
so, 8+11=19+21=40
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Deleted
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Post by Deleted on May 2, 2018 14:02:58 GMT
yeah, another answer is 96, because, 1*(1+4)=5, so 8*(8+11)=96, though, this operation is not correct.
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HecticThinker
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Post by HecticThinker on May 2, 2018 14:17:24 GMT
yeah, another answer is 96, because, 1*(1+4)=5, so 8*(8+11)=96, though, this operation is not correct. Well, it ain't exactly wrong, provided one can surmise the addition between 8 + 11 and 3 + 6 were omitted in purpose. But then again, provided math is a very detailed and to-the-point "language" it should be somehow indicated with "." or something. Well, the funny thing is that sometimes our brain just goes straight up and just considers that it should add 4,5,6 and 7 between 3 and 8, since up to that point there was a n+1 pattern, hehe. |
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Deleted
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Post by Deleted on May 2, 2018 14:19:31 GMT
yeah, another answer is 96, because, 1*(1+4)=5, so 8*(8+11)=96, though, this operation is not correct. Well, it ain't exactly wrong, provided one can surmise the addition between 8 + 11 and 3 + 6 were omitted in purpose. But then again, provided math is a very detailed and to-the-point "language" it should be somehow indicated with "." or something. Well, the funny thing is that sometimes our brain just goes straight up and just considers that it should add 4,5,6 and 7 between 3 and 8, since up to that point there was a n+1 pattern, hehe. True, the multiplication operation here is not straightforward, and includes distributive property, though, it needs a bit of guessing. |
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Post by Elizabeth on May 2, 2018 20:41:29 GMT
And the other answer is probably 40. I think this one it more "correct" though. It doesn't presume anything at all. A very nice little riddle really. Thanks. I'm trying to find another riddle too  |
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