2015 UMO Problems/Problem 5
Problem
A 
grid is filled with integers (positive or negative) such that the product of the integers
in any row or column is equal to 
. For example, one possible grid is:
In how many ways can this be done?
Solution
See Also
| 2015 UMO (Problems • Answer Key • Resources) | ||
| Preceded by Problem 4 |
Followed by Problem 6 | |
| 1 • 2 • 3 • 4 • 5 • 6 | ||
| All UMO Problems and Solutions | ||
