Problem: A three-digit number has, from left to right, the digits , and with . When the number with the digits reversed is subtracted from the original number, the units' digit in the difference is . The next two digits, from right to left, are.
Answer Choices:
A. and
B. and
C. impossible to tell
D. and
E. and
Solution:
The original number is . The number with digits reversed is .
(Since , to subtract we must add to , etc.)
Since and therefore, the digits from right to left are and .