Number and Operations Session 5: Divisibility Tests and Factors

This session introduces some topics related to number theory. Number theory allows us to consider why mathematics works the way it does. You will work with "Alpha math" problems to explore relationships among numbers, which is an important part of thinking about mathematics. You'll look at divisibility tests and why they work, and then move on to examine factors.

Part A:
Alpha Math

Part B:
Divisibility Tests

Part C:
Factors

Homework

In this session, you will do the following:
•	Use number theory to build your problem-solving skills
•	Use "Alpha math" problems to deepen your understanding of relationships among numbers and build your problem-solving skills
•	Find and use divisibility tests for 2, 3, 4, 5, 6, 8, 9, 10, and 11 and understand why these tests work
•	Begin to explore and understand factors


	Throughout the session you will be prompted to view short video segments. In addition to these excerpts, you may choose to watch the full-length video of this session.


	Previously Introduced:		New in This Session:
	base		divisibility test factor factor tree figurate number prime number relatively prime numbers

Next > Part A: Alpha Math

Session 5: Index | Notes | Solutions | Video