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: B
Explanation
The correct answer is option 2 i.e 21: 154.
The logic used here is:
2nd number = (1st number × 7) - 3
Option 1: 39: 270
(39 × 7) - 3 = 273 - 3 = 270
Option 2: 21: 154
(21× 7) - 3 = 147 - 3 = 144
Option 2 does not follow the pattern.
Option 3: 37: 256
(37 × 7) - 3 = 259 - 3 = 256
Option 4: 31: 214
(31 × 7) - 3 = 217 - 3 = 214
Hence, option 2 is the odd one out.
Hence, the correct answer is 21: 154.