2010 UNCO Math Contest II Problems/Problem 7
Problem
and 
are each 
-digit 
numbers (like 
and 
), and all four digits are different.
The sum 
is a -digit number made up of two more different digits ( is not necessarily prime).
Further, the difference 
consists of yet two more different digits (again, is not
necessarily prime). The number 
is a two digit number which uses the remaining two digits.
What is ?
Solution
See also
| 2010 UNCO Math Contest II (Problems • Answer Key • Resources) | ||
| Preceded by Problem 6 |
Followed by Problem 8 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 | ||
| All UNCO Math Contest Problems and Solutions | ||
