Select the triad in which the numbers are related in the same way as are the numbers of the following triads.
15-14-13
17-21-25
(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/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)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 19-22-25.
Logic: (1st number + 3rd number) ÷ 2 = 2nd number
15-14-13 → (15 + 13) ÷ 2 = 14
17-21-25 → (17 + 25) ÷ 2 = 21
Similarly, 19 - 22 - 25 → (19 + 25) ÷ 2 = 22