A tangled web
Try this puzzle, but don't tie yourselves in knots! The tangled web puzzle will show you why knots are important in mathematics.
Caesar cipher
Need to keep something secret? This code has been used for thousands of years!
Impossible hole
Here's a nifty way to put a very big hole in a small sheet of paper.
Making a Moebius strip
This activity from CSIRO's Double Helix Science Club provides instructions to make your own Moebius strip and in the process learn about topology.
Mark and recapture
In this activity, amaze your friends by using M&Ms to estimate how many smarties you have!
Math-magic card trick
Follow these instructions and learn how to amaze your friends with this math magic card trick from CSIRO's Double Helix Science Club.
Maths and Stats by Email activity archive
Every issue of Maths and Stats by Email contains a hands-on maths activity. This archive contains activities published in Maths and Stats by Email, so you can try them at home!
Measure pi using a pie
Follow these instructions to measure the constant pi using a pie and then you can eat the leftovers.
Mind reading
This activity from CSIRO's Double Helix Science Club provides instructions for a mathematical 'mind reading' trick.
Read a barcode
Ever wondered how cash registers read barcodes? Do this activity, and you'll be able to read them, too!
River crossing puzzle
The farmer's boat is too small to carry everyone in one trip - can you help him get home safely?
Tangrams
Try this traditional puzzle, and see if you can turn two squares into one square!
