A problem by shanmuga rajesh

Level pending

1,5,23,119,719,5039, _ _ _


The answer is 40319.

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3 solutions

Shanmuga Rajesh
Dec 27, 2014

2!-1=1

3!-1=5

4!-1=23

5!-1=119

6!-1=719

7!-1=5039

therefore, 8!-1=40320-1=40319

Yash Khatri
Dec 27, 2014

1x3 + 2 = 5

5x4 + 3 = 23

23x5 + 4 = 119

119x6 + 5 = 719

719x7 + 6 = 5039 .

Therefore next term= 5039x8+7= 40319

Madhav Srirangan
Dec 27, 2014

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