mental-arithmetic-6

One of the books used. Sample questions from the publisher’s website include: “share £550 in the ratio 𝟧 ∶ 𝟨” and “a parallelogram is drawn so that its smallest angle is one third the
size of its largest angle. How big is the largest angle?”

Clare Wallace

Clare (like gare) is a Chalkdust editor. In her spare time, she’s an assistant professor at Durham University. She likes Skittles, probability, and making the magazine look more like Cosmo.

Chalkdust dissertation prize
Calling all final-year students!
The big argument: What’s the best way to end a proof?
QED or $\square$?
When Truchet met Chladni
Stephen Muirhead meets neither, as he explores waves, tiles and percolation theory
Review of Galois Knot Theory
A thrilling review of this truly enlightening book
How many quadratics factorise?
Write down a quadratic. What is the probability that it factorises? Paging Prof. Dirichet...
Is it possible to reach absolute zero?
After 100 years, a key postulate of the third law of thermodynamics has been proven. We meet Lluis Masanes, one of the researchers responsible.