Secret codes
This book includes considerations of factors, prime numbers, ordered pairs and finite arithmetic. I t can also be used to introduce the idea of a matrix as well as matrix multiplication and simple inverses.
Show health and safety information
Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.
