Select the odd group of numbers. (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: C
Explanation
The correct answer is option 3 i.e. (98–78 –56).
The logic used here is: 1st number - 2nd number = 20, 2nd number - 3rd number = 20
1: (92 –72 –52): 92 - 72 = 20, 72 - 52 = 20
2: (76 –56 –36): 76 - 56 =20, 56 - 36 = 20
3: (98–78 –56): 98 - 78 = 20, 78 - 56 = 22, This does not follow the logic.