Question

The digit at tens place of two digitnum is four times that in unit place if the digit are reversed the new mum will less 54 then the original num find original num

Answer 1

let the number be xy and given that x = 4y and yx + 54 = xy

then 10y + x + 54 = 10x + y

solving we get y =2 and x = 8

the original number is 82