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100, 81, 64, 49, ...

Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.


Puzzle ID:#9761
Fun:*** (2.16)
Difficulty:** (1.22)
Submitted By:hprulz***




Fill in the blank: 100, 81, 64, 49, ... ?

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(user deleted)
Jan 01, 2006

I saw this teaser differently. I subtracted 81 from 100 and got 19. I then did the same with 64 and 81 and got 17. I noticed a difference of two between the numbers. I then tried subtracting 15 from 64 and to no surprise, I got 49. Figuring this must be the pattern, I subtracted 13 from 49 which gave me 36.

Good one. I must admit it took much longer the way I did it, but it was nontheless relatively easy.
Nov 12, 2006

too obvious

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