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 from the rest.
Answer & explanation
Correct answer: option 2
he logic followed here Is :
Sum of the digits in ist number = second number
4209 : 15
4 + 2 + 0 + 9 = 15
5121 : 12
5 + 1 + 2 + 1 = 9 (odd)
8101 : 10
8 + 1 + 0 + 1 = 10
7456 : 22
7 + 4 + 5 + 6 = 22