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)
(5, 4, 2) (9, 9, 3)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. (21, 39, 1)
Logic: ((3rd number × 3) + 2nd number) ÷ 2 = 1st number
(5, 4, 2) → ((2 × 3) + 4) ÷ 2 = 10 ÷ 2 = 5
(9, 9, 3) → ((3 × 3) + 9) ÷ 2 = 18 ÷ 2 = 9
Similarly, (21, 39, 1) → ((1 × 3) + 39) ÷ 2 = 42 ÷ 2 = 21