Three of the following four number pairs are alike in a certain way and one is different. Pick the odd one out.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e 56 : 136.
78 : 127 → 127 – 78 = 49 → square of 7
61 : 97 → 97 – 61 = 36 → square of 6
56 : 136 → 136 – 56 = 80 → not a square
25 : 89 → 89 – 25 = 64 → square of 8
Since all the numbers are perfect squares except 80. Hence, the correct answer is 56 : 136.