4, 5, 9, 18, 34, (…..) - Number Series - Series Completion - Verbal Reasoning question

A. 43

B. 49

C. 50

D. 59

E. None of the above

Answer: D. 59

The pattern is + 1, + 4, + 9, + 16,... i.e., + 1², + 2², + 3²,+ 4²,...
.'. Missing number = 34 + 5² = 34 + 25 = 59.

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