How many triangles can you count in this image? It’s harder than it looks and bound to baffle even the sharpest of brains for ...

Every once in a while, a maths puzzle, brain teaser or exam question aimed at a small child will come along and expose huge gaps in our knowledge. Said problem/puzzle/ question will basically reveal ...

Here's what the Swedish artist Oscar Reutersvard did. In 1934, he got himself a pen and paper and drew four cubes, like this. He called this final version "Impossible Triangle of Opus 1 No. 293aa." I ...