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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 worksheet.

The worksheet (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.

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