Plus.Maths.org
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. From symmetry to Euclid's axioms, and from binary numbers to the prosecutor's fallacy, learn some maths without too much effort.
Maths in a minute: Flipping pancakes 
In time for pancake day here's a problem about flipping pancakes. It turns out to be surprisingly hard.
Maths in a minute: Equal temperatures 
At any point in time there are two points on the Earth's equator with the same temperature.
Maths in a minute: Higher dimensions 
In normal life higher dimensions smack of science fiction, but in mathematics they are nothing out of the ordinary.
Maths in a minute: Transcendental numbers (and politics) 
A quick introduction to transcendental numbers, a famous problem which relates to them, and how the person who solved it became a victim of political tensions.
Maths in a minute: The axioms of probability theory 
Take a quick trip to the foundations of probability theory.
Maths in a minute: Graphs and the degree sum formula 
Double counting proves a neat result in graph theory.
Maths in a minute: Dark matter 
Physicists believe that around 82% of all the matter in the Universe is invisible dark matter. But if it's invisible how do they know it's there?
