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Outside The Hole - If you remove a disk from the center, what is the area of the remaining paper?  |  August 25, 2014
Christmas Tree - There are exactly three equilateral triangles - the object is to move three matches so as to get four equilateral triangles.  |   August 25, 2014
Find The Center - UWhich one of the two dots is the true center of the circle?  |   August 25, 2014
Saddle The Horses - Can you arrange the three cards so that each rider is in his correct riding position on top of each horse?  |  August 25, 2014
The Wine Glasses - The object is to move six of the ten matches in such a way as to get a house instead of the glasses.  |  August 25, 2014
Nob's M - Can you divide this shape into four identical pieces?  |  August 25, 2014
The Five Pennies - Can you arrange these five pennies so that every penny touches every other one?  |  August 25, 2014
In 'n' Out - A great Martin Gardner puzzle...is region B inside the curve or outside it?  |  August 25, 2014
Knight Spell - Spell the word KNIGHT letter by letter, jumping from spot to spot as a chess piece moves.  |  August 25, 2014
Tessellated Tiles - A crafty Henry Dudeney puzzle.  |  August 25, 2014
Exchange Puzzles - In each puzzle, which two tiles should be swapped to get the correct equation?  |  August 25, 2014
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