Series - Logical Reasoning (MCQ) Questions for Q. 29200

Q.  In the following question, one term in the number series is wrong. Find the wrong term.

1, 3, 10, 21, 63, 129
- Published on 07 Jul 17

a. 10
b. 21
c. 63
d. 129

ANSWER: 63
 
The pattern in the give series is –
x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1

The wrong number is 63

The correct number should be: (21 x 3) + 1 = 64

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