The magic square is the basis for Sudoku, pops up in Chinese legend and provides a playful way to introduce children to arithmetic. But all this time it has been concealing a more complex ...

We'll try out toothpick, tangram, and logic puzzles, play strategy games with partners, and unravel the secret of the ancient Chinese magic square. Finally, we’ll help a man stuck in a pit find his ...

The magic square is the basis for Sudoku, pops up in Chinese legend and provides a playful way to introduce children to arithmetic. But all this time it has been concealing a more complex ...