RRB RPF RPSF SI and CONS Model Papers 5 with solutions

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Directions (Q. 42–43): In each of the following questions, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

Question : 42 of 119

Marks: +1, -0

42. 1, 2, 5, 26, ?

Validate

Solution:

(1)

1{––––––––▶}↖{(1^2+1)} 2{––––––––▶}↖{(2^2+1)} 5{––––––––▶}↖{(5^2+1)} 26 {––––––––▶}↖{(26^2+1)}[677]

Hence, the required term is 677.

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