Allie Hays’ friends had a good laugh when they heard about the class she had signed up for at North Central College in Naperville: Mathematics of Square Dancing. Hays thought it was pretty funny ...

The Missing Square Puzzle shows our rendition of a popular geometric conundrum. First, you see a right triangle made of four distinct shapes. Then, these are moved around to fit into the same triangle ...

Draw four lines beginning and ending at the gray points to break this square into pieces that can be rearranged into five identical squares. Show puzzle solution Bonus: Suppose you can use any number ...