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Mathematical magic can seem like mind reading. Your job is to reveal the secret behind these four tricks.

Learn the magic and math of how to win games when your opponent goes first.

A surprising new solution to Leonhard Euler’s famous “36 officers puzzle” offers a novel way of encoding quantum information.

The solution to our puzzle about Euler’s number explains why e pops up in situations that involve optimality.

The transcendental number *π* is as familiar as it is ubiquitous, but how does Euler’s number *e* transcend the ordinary?

How readers used their geometry skills to survive a dangerous puzzle.

In this month’s puzzle, math is a question of life or death.

Playing with numbers can lead to deep mathematical and scientific insights.

Playing with arithmetic can lead us to unexpected and profound discoveries that point toward deeper mathematics and sometimes even deeper science.

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