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.
Answer & explanation
Correct answer: option 1
The logic followed here is
182 : 12 - 122 + 3 × 12 + 1 = 181 ≠ 182 (odd)
461 : 20 - 202 + 3 × 20 + 1 = 461
239 : 14 - 142 + 3 × 14 + 1 = 239
305 : 16 - 162 + 3 × 16 + 1 = 305