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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