RRB RPF RPSF SI and CONS Model Papers 1 with solutions

Question : 39 of 120

Marks: +1, -0

Four of the following five are alike in a certain way and hence form a group. Which one of the following does not belong to that group?

Solution:

(a) The rest are based on the expression x

^{2}

+ 1.
But 126 = 11

^{2}

+ 5.

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