Find out the incorrect number 5, 27, 61, 122, 213, 340, 509 - Number Series - Series Completion -

A. 27

B. 61

C. 122

D. 509

E. None of the above

Answer: A. 27

The correct sequence is 2³ - 3, 3³ - 3, 4³ - 3, 5³ - 3, 6³ - 3, 7³ - 3, 8³ - 3.
So, 27 is wrong and should be replaced by 3³ - 3 i.e. 24.

Posted in: Number Series - Series Completion - Verbal Reasoning