Integral Centrifuge (multiplication of +/-1)

Integral Centrifuge (multiplication of +/-1)

This spinning centrifuge has a matching set of -1 (South) and +1 (North) magnets on the inner and outer ring. The inner ring is the one that spins. You must try to find a combination of +1s and -1s so that when it is rotated away from this all-repulsive position there...
Armenian Rug Puzzles (logic)

Armenian Rug Puzzles (logic)

Armenian rugs cover the floor – sometimes laying atop each other. A whole lot of puzzles arise from trying to find the shape and placement of these rugs. PS. The photo is of the oldest pile rug to be discovered – 2500 years old. It is Armenian, but was...
Ninja Bed Bugs (multiplication)

Ninja Bed Bugs (multiplication)

Smothering Ninja Bed Bugs is important to stop itchy nocturnal sleeps on you King Size bed.   Here is an infestation of your king size bed. It looks nasty. Your job is to smother all those Ninja Bed Bugs by covering them with rectangles. The Ninja Bed Bug Score...
Solidarity – Poland, 1981 (addition, logic)

Solidarity – Poland, 1981 (addition, logic)

Solidarity – Poland, 1981 This game is a blend of strategy and deception. You start the game by being randomly dealt one of five cards (Communists, Nobility, Farmers, Clergy, Workers.)     You secretly draw the Clergy. You want the Clergy to win. For...
Graphene Trampoline (logic & probability)

Graphene Trampoline (logic & probability)

  Richard Smalley was awarded the Nobel prize in Chemistry for the discovery that he could make a very very small soccer ball out of Carbon atoms. In 2005 he suddenly began to shrink. He ended up so small that he could bounce on the little trampolines that make...