Four numbers have been given, out of which three are alike in some manner and one is different. Select the number that is different from the rest.
Answer & explanation
Correct answer: option 4
The logic is:
Last two digit sum is equal to Ist digit
651
6 = 5 + 1
725
7 = 2 +5
853
8 = 5 + 3
421
4 ≠ 2 + 1