SSC CGL 26 Oct 2014 Shift 2 Paper

First Column
2 + 3 + 4 + 5 = 14
⇒14 × 14 = 196
Second Column
3 + 1 + 2 + 5 = 11
⇒11 × 11 = 121
Third Column
4 + 4 + 2 + 2 = 12
⇒12 × 12 = 144
Fourth Column
$\sqrt{225}$ = 15
⇒? + 2 + 6 + 2 = 15
⇒ ? = 15 – 10 = 5