Series Completion

Directions to SolveChoose the correct alternative that will continue the same pattern and replace the question mark in the given series.

6, 18, 3, 21, 7, 56, ?

A 8

B 9

C 63

D 64

ANS:A - 8

Explanation: Each term at an even place in the series is the product of its two adjacent terms. Thus, if the missing term be x, then we have : 7 x x = 56 or x = 56 Ã· 7 = 8.

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