# 1.1 Identifying Prime and Composite Numbers

This is the first section of Chapter 1: Number Relationships. The objective here was to help students understand the difference between prime and composite numbers, and to find quick ways to determine whether a number is prime or composite.

## Introduction to Identifying Prime and Composite Numbers

Defining prime number and composite number. ## First Examples

Determining whether a number is prime or composite, and finding numbers that can be multiplied together to produce that number. ## More Examples

Using Venn diagrams to determine whether numbers are prime or composite. Dealing with exceptions like 1, 0 and negative numbers. ## Experiment: Finding a More Efficient Way to Determine Whether a Number is Prime or Composite

In this activity, students tested a couple different numbers to see if they could figure out a pattern to why numbers are prime or composite. Their objective was to find out if we need to check all the possible factors of a number, or if there is a shortcut.

Jeremy Barr