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### An introduction to Magic Squares

Find out about Magic Squares in this article written for students. Why are they magic?!

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### An Introduction to Tree Diagrams

This article explains how tree diagrams are constructed and helps you to understand how they can be used to calculate probabilities.

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### Divisibility Tests

This article explains various divisibility rules and why they work. An article to read with pencil and paper handy.

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### An introduction to modular arithmetic

An introduction to the notation and uses of modular arithmetic

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### An introduction to proof by contradiction

An introduction to proof by contradiction, a powerful method of mathematical proof.