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Series Completion Interview Questions and Answers

Question -
563, 647, 479, 815, ?

A. 672
B. 386
C. 279
D. 143


Answer -

Option D

Explanation:

The pattern is + 84, - 168, + 336,.....i.e. + 84, - (84 x 2), + (84 x 22), .....

So, missing term = 815 - (84 x 23) = 815 - 672 = 143.

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