Question 12

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 7, 42, 210, 840, ?

Solution

Consecutive natural numbers in decreasing order are multiplied

1 $$\times7$$ = 7

7 $$\times6$$ = 42

42 $$\times5$$ = 210

210 $$\times4$$ = 840

840 $$\times3$$ = 2520

=> Ans - (D)

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