Find the odd number pair: 13 : 21, 19 : 27, 15 : 23, 16 : 24.

A13 : 21

B19 : 27

C15 : 23

D16 : 24 ✓ Correct

Correct answer: (D) 16 : 24

Explanation

16 : 24 is the odd pair.

In 13 : 21, 19 : 27 and 15 : 23 the gap is 8 and both numbers are odd.

Each of these three pairs has two odd numbers differing by 8.

16 and 24 differ by 8 but both are even.

So the pair of even numbers stands apart.

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