Australian Mathematical Society

The AIMS Puzzle Corner
A collection of puzzles from the AIMS (Activities Integrating Maths and Science) Education Foundation. The solutions can be obtained through email.

Brain Teasers
From Houghton Mifflin. There is weekly brain teaser with the solution posted at the end of the week. There is also an archive of previous puzzles.

MathMagic!
A team approach to problem solving using Internet email. Challenges are divided by age group.

Australian Association of Mathematics teachers

Interactive mathematics & puzzles