RRB RPF RPSF SI and CONS Model Papers 1 with solutions

Question : 40 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 is different from the group?

Solution:

226 = 15 ^ { 2 } + 1 ;

290 = 17 ^ { 2 } + 1 ;

170 = 13 ^ { 2 } + 1;

122 = 11 ^ { 2 } + 1

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