The sum of the digits of a two-digit number is 1/5 of the difference between the number and the number obtained by interchanging the positions of the digits. What definitely is the difference between the digits of that number?(CTS COMPANY)

The sum of the digits of a two-digit number is 1/5 of the difference b

1.	The sum of the digits of a two-digit number is 1/5 of the difference between the number and the number obtained by interchanging the positions of the digits. What definitely is the difference between the digits of that number?(CTS COMPANY)
A.	7
B.	5
C.	6
D.	9
Answer» C. 6