A two digit number is such that the product of digit is 8 . when 18 is added to the number , the digits are reversed . The number is:

Explanation

Let the digits of the number are `x` and `y` where `y` is the unit digit.

Then, the number will be `10x+y`.

It is given that,

` xy = 8=>x = 8/y->(1)`

Also,

`10x+y +18 = 10y+x`

`=>9x-9y = -18`

`=>x-y = -2`

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