RRB NTPC 2014 Paper

Question : 77 of 100

Marks: +1, -0

Which of the following will replace ‘?’ in the series given below?
2, 9, 28, 65, ?, 217, 344, 513

Solution:

(3) The series follows the structure(

n^3

+ 1), where n denotes natural numbers starting from 1. So,
? =

5^3

+ 1 = 126.

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