The difference between a two-digit number and the number obtained by interchanging the two digits is 63. Which is the smaller of the two numbers?  Pick:
A) 29 B) 70 C) 92 D) Cannot be determined E) None of these
Explanation:   Let the ten's digit be x and units digit by y.   Then,   (10x + y) - (10y + x) = 63   9(x - y) = 63   x - y = 7   Thus, none of the numbers can be determined.   ANSWER IS Cannot be determined
<result>D</result>
The difference between a two-digit number and the number obtained by interchanging the two digits is 63. Which is the smaller of the two numbers?