Maths in a minute

Continued fractions reveal the good, the bad and the beautiful side of numbers.
Eleven makes multiplication easy.
A quick look at an ancient problem.
Why there are only three regular polygons you can tile a wall with.
Fermat's little theorem and fake primes.
The mathematical problem with turbulence.
Capturing symmetry with algebra.
Why the humble average can be grossly misleading.
How to write a sum that's infinitely long.
Euclid's fourth axiom says that all right angles are equal. But isn't that obvious?