21 Can any number of squares sum to a square? 7 Is it known whether strips cannot be tiled aperiodically with a single tile? 6 Dissecting a square into similar 1:sqrt(2) rectangles 4 Tetronimo Tiling with given tiles : How to eliminate early cases where no solution exist 3 Color a 1000 by 1000 grid with 0s and 1s

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### Questions (33)

 42 Can any number of squares sum to a square? 31 How can I generate “random” curves? 19 How many colors are necessary for a rectangle to never cover a color more than once? 16 How close are the closests cells of the same color in a periodically colored grid? 14 Is every “even” polyomino with one hole tileable by dominoes?

### Tags (47)

 55 tiling × 43 8 dissection × 3 31 polyomino × 17 7 combinatorics × 12 21 elementary-number-theory × 2 4 puzzle 21 square-numbers × 2 2 discrete-geometry × 4 14 geometry × 8 2 rectangles × 3

### Bookmarks (23)

 56 Nice expression for minimum of three variables? 27 On existence of boards that be covered by every free tetromino 21 Tiling a square with rectangles 16 Longest path through a rectangular board 14 $\max(a,b)=\frac{a+b+|a-b|}{2}$ generalization