Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number pair that is different.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 17: 307
The logic used here is:
2nd number = 1st number × (1st number + 1)
Option 1: 12: 156
12 × (12 + 1) = 12 × 13 = 156
This follows the logic.
Option 2: 18: 342
18 × (18 + 1) = 18 × 19 = 342
This follows the logic.
Option 3: 17: 307
17 × (17 + 1) = 17 × 18 = 306
This does not follow the logic.
Hence, Option 3 is the odd one out.