Select the set in which the numbers are related in the same way as the numbers of
the following sets. (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.)
(20, 90, 10) (25, 135, 10)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. (18, 72, 10)
The logic used here is:
(20, 90, 10) = 20 - 10 = 10, 10 × 9 = 90
(25, 135, 10) = 25 - 10 = 15, 15 × 9 = 135
Similarly,
(18, 72, 10) = 18 - 10 = 8, 8 × 9 = 72