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. (Any operation on digits is not allowed)
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 197: 66.
The logic used here is:
2nd number × 3 + 5 = 1st number
Option 1: 326: 107
107 × 3 + 5 = 326
This follows the logic.
Option 2: 239: 78
78 × 3 + 5 = 239
This follows the logic.
Option 3: 308: 101
101 × 3 + 5 = 308
This follows the logic.
Option 4: 197: 66
66 × 3 + 5 = 203
This does not follow the logic.
Hence, option 4 is the odd one out.