A very interesting piece of the Real-Life Math puzzle that is the ultimate Back-to-school activity!
Multiplication Tables, Prime and Composite Integers, Coprime Pairs of Integers
The Euler Phi Function asks easy questions like: "Does 3 and 10 have a common factor larger than 1?" 3 and 10 are called coprime (or relatively prime).
This product includes a FREE classroom poster, a FREE Google Form quiz (and a FREE PDF-version of the quiz) and a FREE key to the task.
The task, (with key), will involve...
Prime Numbers
Determining if two integers are coprime
The Euler Phi-Function
Euler's Formula
The Euler Phi-Function forms an integral part of the RSA Cryptosystem.
It is important that students know (and that teachers always remind them) when they are busy with these topics, that they are learning fundamental mathematics needed to encrypt data and secret messages.
You might also want to look at the Bundle for all the Math for the RSA Cryptosystem!
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