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 4
The logic followed here is:
(Ist number)2 × (ist number + 1) = second number
Option 1 9 - 810
(9)2 × (9 + 1) = second number
81 × 10 = 810
Option 2 11 - 1452
(11)2 × (11 + 1) = second number
121 × 12 = 1452
Option 3 7 - 392
(7)2 × (7 + 1) = second number
49 × 8 = 1452
Option 4 13 - 2368
(13)2 × (13 + 1) = second number
169 × 14 = 2366 ≠ 2368 (odd)