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: D
Explanation
The correct answer is option 4 i.e. 61 : 133.
1. 52 : 93 ⇒ (52 × 2) - 11 = 104 - 11 = 93
2. 40 : 69 ⇒ (40 × 2) - 11 = 80 - 11 = 69
3. 38 : 65 ⇒ (38 × 2) - 11 = 76 - 11 = 65
4. 61 : 133 ⇒ (61 × 2) - 11 = 122 - 11 = 111 ≠ 133