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.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 9 : 639.
The logic used here is: (First Number)3 - (First Number)2 = Second Number
4 : 48 :- (4)3 - (4)2 = 48
6 : 180 :- (6)3 - (6)2 = 180
8 : 448 :- (8)3 - (8)2 = 448
9 : 639:- (9)3 - (9)2 = 648, This does not follow the logic.