King Midas made 4 Urns to carry his gold bars. For good luck he wrote a 4 digit number – one digit on each urn.…
You are the mayor of a small town and are given the mandate to build 10 floors of residential housing. For example, you could build…
Carl Sagan and Joseph Campbell were walking on the Milky Way last evening. Carl turned to Joseph and said “What a lot of stars!” “But…
Just like in the problem Mirror, Mirror in the Box, a triangular box plays tricks with light. Mirrors reflect light beams that hit them obliquely…
What is Needed: A piece of dotted paper, pen, and 3 tree planters for each team. How to Play: Decide who goes first.The players take…
Fill the following triangle with red, yellow and blue circles so that no circles of the same color are next to each other. Extensions: Is…
The Wise Women of Titan want to re-tile the enormous rooms of their palace using rectangles, but for aesthetic reasons they do not want identically…
Frogs have a saying: “The Other Lily Pad Is Always Greener”. Some green and yellow frogs were arguing about this until they agreed that they…
On a cold winter evening, Olive, the green tetrahedron said to her identical quadruplet sisters “It’s so cold that my vertices are numb, my edges…
A colony of termites has attacked a house by carving out passageways trough the floorboards. The damage done is proportional to the number of triangles…