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.
Answer & explanation
Correct answer: option 2
option 1 16 - 49
42 - 72
option 2 48 - 81
not square - 92 (odd)
option 3 25 - 36
52 - 62
option 4 64 - 100
82 - 102