Question

there is two digit figure in which one digit is exactly half the other. If the position of both fonts or digits is interchanged, the resultant figure when added with the origional figure sum to 99. what is the origional figure?

Answer 1

Let the first digit be x and the second be y.
The number is xy(note that they're not multiplied together)

xy+yx = 99
let y=2x
Trial and error from here
36+63=99
:)