SSC CHSL 29 JAN 2017 SHIFT 3 TIER 1 REASONING QUESTION 8

8.Select the odd word/letters/number/number pair from the given alternatives.
Options:
1) 242
2) 431
3) 260
4) 531
Answer: 4

Sum of all digits of the given numbers is 8 except 531.

242 -> 2 + 4 + 2 = 8
242 -> 4 + 3 + 1 = 8
260 -> 2 + 6 + 0 = 8
531 -> 5 + 3 + 1 = 9