In the following question, four number pairs are given. In each pair the number on left side of (-) is related to the number of the right side of (-) with some Logic/Rule/Relation. Three pairs are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives. (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 1
The logic followed here is :
(Ist number × 2) - 1 = second number
22 - 40 = (22 × 2) - 2 = 40 (ODD)
24 - 47 = (24 × 2) - 1 = 47
18 - 35 = (18 × 2) - 1 = 35
16 - 31 = (16 × 2) - 1 = 31