Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E g. 13-Operations on 13 such as adding/subtracting/multiplying etc to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 47 : 83.
63 : 137 → 63 × 2 + 11 = 137
70 : 151 → 70 × 2 + 11 = 151
47 : 83 → 47 × 2 + 11 = 105 ≠ 83
34 : 79 → 34 × 2 + 11 = 79