Monthly Archives: June 2020

Consider this $9\times 9\times 9$ grid, in which some cubes have been shaded. It can be represented in two dimensions by viewing it from one side and using numbers from $1$ to $9$ to give the location of each cube … Continue reading →

The most recent of Matt Parker’s Maths Puzzles was the unique distancing problem: For which $n\in\mathbb N$ is it possible to place $n$ counters on an $n\times n$ square grid so that there’s a different distance between each pair of … Continue reading →