Friday, May 29, 2009

Guess the next number

What number comes next in the sequence 1 2 6 42 1806?
Why?
Puzzle submitted by Ola M.

3 comments:

Anonymous said...

1*2=1
2*3=6
6*7=42
42*43=1806
1806*1807=3263442
Generally: n*(n+1)=Next n.
This seem to be a right representation for the next number.

Maria said...

Very smart!
Dear anonymous, please feel free to add your name here below or email it to me maria at marialando dot com to enter the race and get a prize after solving three puzzles.

Alin Grin said...

Alin Grin

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