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What can the mathematical genius Srinivasa Ramanujan teach us about number theory through mathematical structures involving infinity?

Insights from the mathematical genius Srinivasa Ramanujan give us a number of ways to explore the infinite.

Hilbert’s Hotel, an incredibly thin triangle and an elliptical pool table help us test the concept of infinity in the physical world.

Three puzzles test whether the concept of infinity has purchase in the physical world.

Try these shortcuts for solving problems that seem to require a lengthy calculation.

Can you find a shortcut for solving problems that seem to require a lengthy calculation?

The famous Sleeping Beauty problem has divided probability theorists, decision theorists and philosophers for over 15 years. Puzzle columnist Pradeep Mutalik claims to have discovered the source of confusion.

For four game show variations of the hat puzzle, four clever ways to earn a better payoff than you might expect.

In three new variations of a famous logic puzzle, what are the best strategies for guessing the color of the hat on your head?