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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:*** (2.22)
Difficulty:**** (3.11)
Category:Series
Submitted By:bluelightnign***
Corrected By:MarcM1098

 

 

 



What is the next number in this series?

4, 12, 84, 3612....



Answer

6526884. To get from 4 to 12, you use the following formula. 12 = (4 squared)/2 + 4.

Continue on with (X^2)/2 + X.

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