The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?  Choose the correct choice from the following answers.
A) 79 B) 56 C) 81 D) Cannot be determined E) None of these
Let the ten's digit be x and unit's digit be y.   Then, x + y = 15 and x - y = 3 or y - x = 3.   Solving x + y = 15 and x - y = 3, we get: x = 9, y = 6.   Solving x + y = 15 and y - x = 3, we get: x = 6, y = 9.   So, the number is either 96 or 69.   Hence, the number cannot be determined.   Answer:Cannot be determined
<result>D</result>
The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?