| Page 11 | plus.maths.org

Puzzles

Which fits best - a square peg in a round hole, or a round peg in a square hole?

Try your hand at some tricky trig!

Puzzle page: The Möbius Challenge

Set your beloved heart a-flutter with this mathematical valentine

Count up your booty of jewels and potions!

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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.

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 real numbers and Cauchy sequences

We take the real numbers for granted, but what are they really?
Clocking the schedule

The way many football leagues schedule their fixtures can lead to unfair effects — and unsolved maths problems!
The maths of randomness

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

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