Three of the following four number - pairs are alike in a certain way and one is different. Pick the number - pair that is different from the rest.

Options

A. `7:46`
B. `9:80`
C. `6:35`
D. `4:15`

Answer

A

Explanation

Expect the number pair 7 : 46, in all other number pairs the second number is one less than the perfect square of the first number.
`(9)^(2)-1=81-1=80`
`(6)^(2)-1=36-1=35`
`(4)^(2)-1=16-1=15`
But,
`(7)^(2)-3=49-3=46`