Blueee's Number Puzzle
Online game that displays a random choice of one of 15,000 different math puzzles. Six nested equations are shown with icons instead of digits. Find the digits to solve the puzzle.
Caught At Work Productions
Offers a new brain teaser each Thursday, plus archive of past puzzles.
Chockablock
Java game in which the player tries to score points by filling up 3 by 3 squares on a grid using tetris style pieces. Try to make the high scores list.
CombinationLock.com
Select a numerical sequence based on clues. Has a hall of fame.
Diamond 16 Puzzle
Rearrange rows, columns, and quadrants in a 4x4 array of 2-color squares to solve the puzzle and to make a variety of symmetric designs.
Misronet.com Puzzles
Offers free interactive logic puzzles including solutions and tips on how to solve brain teasers.
Rolling Cubes
Roll eight half black and half white cubes around a 3 by 3 grid until you have reversed the colors.
The Lateral Puzzles Forum
Set or solve lateral thinking puzzles. Includes a selection of current and already solved puzzles.
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