Three of the following number pairs are alike in some manner and one is different. Select the odd number pair.
(NOTE: The second number in the given number pairs is formed by performing a certain operation on the first number. The same operation is followed in all the number pairs except one. Find that odd number pair.)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 100 : 12.
1) 297 : 33 → 33 × 9 = 297
2) 189 : 21 → 21 × 9 = 189
3) 100 : 12 → 12 × 9 = 108 ≠ 100
4) 63 : 7 → 7 × 9 = 63