Friday 24th Feb – Square Numbers, Triangle Numbers and Divisibility Tests

LEARNING OBJECTIVE: you will learn how to generate Square Numbers and Triangle Numbers and discover how to test if a number is divisible by 2, 3 , 4, 5 and 10

SUCCESS CRITERIA: You will be able to write down the first 10 square and triangle numbers and be able to tell if a number can be divided exactly by 2, 3, 4, 5 or 10

Divisibility Rules

STARTER: Watch this Video

LESSON: Using the Video explain how triangle numbers can be generated. Ask for other patterns that can be spotted

Use this Video to show how to generate square numbers.

Extra Challenge if time:

Add together two triangle numbers that are next to each other. What do you notice? Can you explain why this happens?

After Lunch.

How can you tell if a number can be divided by 2?

How can you tell if a number can be divided by 10?

How can you tell if a number can be divided by 5?

Is there a rule that you can use to test if a number can be divided by 3?

Or 4?

Or 6?

Or 7?

Or 8?.....

For each of these numbers Can you explain which numbers are divisible by 2 or 3 or 4 or 5 or 10

248, 1680, 3495, 7764, 6745, 9852, 13344, 36750, 7896, 234 564

PLENARY: Checking Answers throughout lesson, quick summary of triangle num, square num and divisibility checks from students, with five finger feedback.