Select the set in which the numbers are related in the same way as the numbers of the following set.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding /subtracting /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)
(21, 5, 120) (2, 7, 8)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. (3, 4, 10)
The logic used here is:
(21, 5, 120) = (21 - 1) × (5 + 1) = 120
(2, 7, 8) = (2 - 1) × (7 + 1) = 8
Similarly,
(3, 4, 10) = (3 - 1) × (4 + 1) = 10