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More ways to get Braingle...

4, 12, 84, ...

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

 

Puzzle ID:#8153
Fun:*** (2.25)
Difficulty:**** (3.1)
Category:Series
Submitted By:bluelightnign***
Corrected By:MarcM1098

 

 

 



What is the next number in this series?

4, 12, 84, 3612....





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Comments

stm8r1us*
Nov 14, 2002

Ouch. Good one!
cnmne*us*
Mar 20, 2004

Another formula: y = x * ((x/2) + 1).
Gerrard10Aus*
Jan 09, 2008

pretty hard!!!!!
javaguru*us*
Mar 08, 2009

I did it like cnmne. Not really that hard, don't know why this is rated so difficult.



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