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)
Answer & explanation
Correct answer: option 3
The logic followed here is :
(Ist number)2 - 10 = second number
13 - 159 = 132 - 10 =159
9 - 71 = 92 - 10 = 71
5 - 31 = 52 - 10 = 15 but 31 is given Odd
17 - 279 = 17 2 - 10 = 279