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1, 5, 12, 22, 35, 51, 70, ?

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


Puzzle ID:#43139
Fun:** (1.95)
Difficulty:** (1.74)
Submitted By:shenqiangAcn****!!




What comes next in this number sequence?

1, 5, 12, 22, 35, 51, 70, ?

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Sep 21, 2008

LOL - if someone else submitted this, it would have been trivial. But when you see "shenqiang" on the teaser, you start thinking about different number bases, unusual operations (e.g. modulo), number of prime factors, etc., etc. So in effect, this one was tricky!
Sep 22, 2008

I noticed the 3's, but missed because of a simple math error: 12-5=6 Oops.
Jan 14, 2009

I got one right for a change!

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