List by Author: Antonella Perucca

The hardest logic puzzle ever

Try your brain at this tricky, but lovely, riddle.

Maths around the clock

Are you bored with 1 to 12? Then have a look at these mathematical clock faces!

Arithmetic billiards

Need to find the least common multiple or greatest common divisor of two numbers? A billiard table of the right proportions holds the answers!