Question

Choose the odd pair out from the given alternatives.
1. 692 ; 584
2. 391 ; 663
3. 847 ; 289
4. 765 ; 666

Answer 1

Correct Answer - Option 2 : 391 ; 663

The logic follows here is :-

By observing the given options :

1) 692 ; 584 → 6 + 9 + 2 = 17 ; 5 + 8 + 4 = 17

2) 391 ; 663 → 3 + 9 + 1 = 13 ; 6 + 6 + 3 = 15

3) 847 ; 289 → 8 + 4 + 7 = 19 ; 2 + 8 + 9 = 19

4) 765 ; 666 → 7 + 6 + 5 = 18 ; 6 + 6 + 6 = 18

Hence, here Sum of digits of first number and sum of digits of second number is equal except '391 ; 663'.

Thus, the odd one is '391 ; 663'.