Home > Numbers
It's not a Magic Square (Posted on 2019-10-17) |
|
In how many distinct ways can I fill a 3×3 grid with the integers 1 through 9 (each occurring exactly once) such that all cells in the grid are coprime with the neighbors? (Note that rotations and reflections count as distinct ways of filling the grid)
Note: A cell's neighbors are the cells that share a full side with it. If two cells share a corner but not a side, they are not neighbors.
Comments: (
You must be logged in to post comments.)
|
|
Please log in:
Forums (0)
Newest Problems
Random Problem
FAQ |
About This Site
Site Statistics
New Comments (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On
Chatterbox:
|