An art gallery problem
42945
Find the minimal number of guard points of polygon
91112
Rooks on a 8 by 8 checker board. Probability problem
107964
Simple combinatorics problem.
34334
Combinatorics Problem with symbols and spaces
118098
Rectangles Covering
66895
A condition for the image of a metrizable space to be metrizable
126944
Metric spaces problem
12557
Coloring Graph Problem
155381
Can anyone help me with a solution?
152236
What is the optimal path between $2$ fixed points around an invisible obstructing wall?
1495
The Frobenius Coin Problem
149585
Game with 37 diagonally-oriented holes, 10 black pegs and 10 white pegs
10724
Case of the 'mice problem' for $n=3$
63141
Need help with a work around
144963
picture, figure is shifting
34493
Concrete Mathematics - The Josephus Problem
114792
Mathematical strategy puzzle