Brain Teasers & Puzzles 
Puzzles... Puzzles??? Puzzles!!!Some people love them, others hate them. I love them and started collecting them, partly for my students as brain exercises because, according to de Bono:
(Edward de Bono. 1995. Mind Power.
Dorling Kindersley.) 

Puzzle / Problem 
Puzzle / Problem 
2 Quilts from one 13x13 quilt  Hexagon puzzle 
4 Colours, 16 squares  How to get to the other side 
4 Colours, 4 cubes  The looped band 
5 Pieces, 6 Figures  Matches puzzles 
5 Colours, 16 squares  Mathematical expression 
5 Shapes, 1 square  Mathematics: x = 4 
8 Queens on a chess board  Mathematics: find a value for ? 
Binary puzzle (colour contact)  Missing corners 
Centre of mass of a coke can  Origami 
Coin puzzle  Pentomino Puzzles 
Connect the dots  Convex polygons 
Cut the Cake  Seeing is believing! 
Divide the square  The Soma cube 
Domino mathematics  Tie a knot 
Dwarfs  Twisted Wires 
Electric Bulb Puzzle  Twos 
Find the expression (some lateral thinking is asked for)  U2 Concert to start in 17 minutes ... 
More phrases  Water Puzzle 
Get in Gear 
Links to "Puzzle and Brain
Teasers" sites on the Internet. 
16 July 2005 