The second number in the given number-pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number-pairs EXCEPT one. Find that odd number-pair.
Answer & explanation
Correct answer: option 2
The logic followed here Is :
option 1 100 : 7
102 = 100
10 - 3 = 7
option 2 25 : 4
52 = 25
5 - 3 = 2 odd
option 3 169 : 10
132 = 169
13 - 3 = 10
option 4 64 : 5
82 = 64
8 - 3 = 5