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: B
Explanation
The correct answer is option 2 i.e. (700 –690 –685).
The logic used here is: 1st number - 5 = 2nd number, 2nd number - 5 = 3rd number
1: (405 – 400 –395): 405 - 5 = 400, 400 - 5 = 395
2: (700 – 690 –685): 700 - 5 = 695, 695 - 5 = 690: This does not follow the logic.