The Queen was upset. During her gold-hilted sword practice she had missed the target and ended up impaling her favourite quilt to the wall. Although…
Queens can sometimes be vain. Place 7 Queens on the intersections of this triangular chess board so that none can look down a line and…
Once upon a time there was a plain chef that lived on the prairie. People came from far away to eat his pointy spaghetti which…
If you are already familiar with The Bridges of Konigsberg, please proceed to The Party in Konigsberg. The Bridges of Konigsberg: In the eighteenth century,…
Draw an outline around any 2 by 2 square. Look at the numbers in the square. What patterns do you see?Use addition to find another…
Minarets in the utopian downtown of New Istanbul will be so beautiful that it will be the law that from every minaret, every other minaret…
You are the leader of a Scottish clan; either the McGuires or the McConnells. In preparation for war, you send out your envoys to demand…
On top of the Tibetan plateau there are two giant rivers that flow into China. The Southern one is called the Yangtze. The Northern one…
There are seven lights in a circle. They are all turned off and the problem is to turn them on. Each light has a switch.…
A fake karate brick looks like a regular brick, but when it is hit with a karate chop, it disintegrates. Sometimes people use these fake…