MathDB
Problems
Contests
National and Regional Contests
USA Contests
USA - College-Hosted Events
BMT Problems
2020 BMT Fall
Tie 4
Tie 4
Part of
2020 BMT Fall
Problems
(1)
2020 BMT Individual Tiebreaker 4
Source:
1/9/2022
In an
6
×
6
6 \times 6
6
×
6
grid of lattice points, how many ways are there to choose
4
4
4
points that are vertices of a nondegenerate quadrilateral with at least one pair of opposite sides parallel to the sides of the grid?
combinatorics