Instructions

What will come in place of the question mark (?) in the following number series ?

Question 57

4 6 12 30 90 (?)

Solution

The pattern here is :

4 $$\times \frac{3}{2}$$ = 6

6 $$\times \frac{4}{2}$$ = 12

12 $$\times \frac{5}{2}$$ = 30

30 $$\times \frac{6}{2}$$ = 90

90 $$\times \frac{7}{2}$$ = 315

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