Select the set in which the numbers are related in the same way as are the numbers of the following set.
(NOTE : Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding /deleting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is NOT allowed)
(7, 1, 72) (5, 2, 18)
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. (3, 1, 8).
Logic: (1st number - 2nd number)2 × 2 = 3rd number
(7, 1, 72) → (7 - 1)2 × 2 = 72
(5, 2, 18) → (5 - 2)2 × 2 = 18
Similarly, (3, 1, 8) → (3 - 1)2 × 2 = 8