Question

A two digit number is such that the product of its
digits is 20. If 9 is added to the number, the digits
interchanged their places. Find the number.​

Answer 1

Step-by-step explanation:

Let the two no taken as x,y

product of xy=20

there a possibility for 20 as 4×5,10×2

but if for 45 the 9 is added it interchanges so we can the possibility of 4×5,

45+9=54

the original no is 45