Discussion of Question with ID = 160 under Missing-Numbers

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Question

Directions : One number is wrong in the series. Find out the wrong number.

1, 2, 6, 21, 84, 445, 2676

A

2

B

6

C

21

D

84

Soln.
Ans: d

Series of the pattern:

1 × 1 + 1 = 2, 2 × 2 + 2 = 6, 6 × 3 + 3 =21, 21 × 4 + 4 =88, 88 × 5 + 5 = 445, 445 × 6 + 6 = 2676.

Therefore, number 84 should be replaced by 88.


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