Thank you for all your entries to our last competition. Congratulations to the 3 winners: Sheree Rogers of Redlynch Heights, Robert Brier of Kingaroy and Shaun Sturgess of Rockhampton.

Last issue we launched Club Infinity; a maths club acting as a focus for the mathematical activities run by the Department of Maths at the University of Queensland. We have been overwhelmed by your response! Club Infinity Packs will reach you soon.

In issue 4 of Infinity we talked about RSA, an encryption method widely used by banks to keep your PIN a secret. Last month a teenager Sarah Flannery (16) developed a brand new encryption scheme based on matrices (called Cayley-Purser after famous mathematicians) which is faster than RSA, and just as secure! (see http://news.bbc.co.uk/hi/english/sci/tech/newsid_254000/254236.stm)

If you would like class sets of Infinity or just an individual copy send us your details. Don’t forget to try this issue’s competition.

Diane Donovan and Cathy Holmes.

Mathematics Department, Uof Q, Brisbane 4072, tel 33653277