Question

The difference of digits of two-digit number is 1 and their product is 12.​

Answer 1

t - u = 1---->t - (12/t) = 1

tu = 12 t^2 - 12 = t

t^2 - t - 12 = 0

(t - 4)(t + 3) = 0

t = 4, so u = 3

The numbers are 34 and 43.