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Puzzles

Multiplying rabbits and cosmic strings

More milk with your tea, or is that tea with your milk?

Can money turn the monarchy upside-down?

Gobbling Gorillas

Will this ship of fools stay afloat?

Can you help the gorilla grab his grub?

What happens when Santa gets confused?

More mathematical misfits for you to master

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Maths in a minute

Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.

The two envelopes problem solved

Here's a resolution for one of probability theory's most famous paradoxes.
Maths in a minute: The axioms of probability theory

Take a quick trip to the foundations of probability theory.
Citizen science: Schumann resonances

Resonant electromagnetic waves, created by lightning flashes, circle the Earth. Wim Hordijk explores the maths and shows how you can keep track with these phenomena.
The maths of randomness

Randomness is surprisingly hard to define. Fortunately the mathematical language we use to describe it is beautifully well defined.
Arithmetic billiards

Need to find the least common multiple or greatest common divisor of two numbers? A billiard table of the right proportions holds the answers!

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