The second number in the given number-pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) is/are followed in all the number-pairs, except one. Find that odd number-pair.
(NOTE: The relation should be found without breaking down the numbers into its constituent digits)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 225 : 169.
The numbers in sets 2, 3, and 4 are squares of consecutive numbers.
But for set 1, the numbers are squares of 15 and 13, which are not consecutive.