Select the odd group of numbers. (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)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. (15 – 220 – 215).
The logic used here is: (1st number)2 = 2nd number, 2nd number - 5 = 3rd number
Option 1: (15 – 220 – 215): 152 = 225, 225 - 5 = 220, This does not follow the logic.