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In "Number Series" question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces

Find the wrong number in the series :
7, 28, 63, 124, 215, 342, 511

Option:
A. 7
B. 28
C. 124
D. 215
E. 342
Answer: B . 28

Justification:

Clearly, the correct sequence is
(23 - 1), (33 - 1), (43 - 1), (53 - 1), (63 - 1), (73 - 1), (83 - 1).
.'. 28 is wrong and should be replaced by (33 - 1) i.e. 26.
Hence, the answer is (b).

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