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Series Completion Interview Questions and Answers

Question -
1, 3, 10, 21, 64, 129, 356, 777

A. 21
B. 129
C. 10
D. 356


Answer -

Option D

Explanation:

The correct pattern is x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1,.....

So, 356 is wrong and must be replaced by (129 x 3 + 1) i.e. 388.

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