List by Author: Antonella Perucca

The hardest logic puzzle everTry your brain at this tricky, but lovely, riddle.
Maths around the clockAre you bored with 1 to 12? Then have a look at these mathematical clock faces!
Arithmetic billiardsNeed to find the least common multiple or greatest common divisor of two numbers? A billiard table of the right proportions holds the answers!