Divisibility Rules for 3, 6, and 9

This video tutorial covers the divisibility rules for the numbers 3, 6, and 9. It explains how to determine if a number is divisible by these numbers using simple arithmetic methods. The tutorial also demonstrates how to use these rules to find common factors of numbers, providing examples and step-by-step explanations. The video aims to enhance students' understanding of divisibility and its application in finding common factors.

Which of the following numbers is divisible by 3?

• 12

• 15

• 13

• 14

What is the remainder when 13 is divided by 3?

• 0

• 3

• 1

• 2

A number is divisible by 3 if the sum of its digits is:

• A prime number

• A multiple of 3

• Odd

• Even

Is the number 540 divisible by 3?

• Only if it is odd

• Only if it is even

• No

• Yes

A number is divisible by 6 if it is divisible by:

• 3 and 4

• 2 and 4

• 3 and 5

• 2 and 3

Is the number 822 divisible by 6?

• Yes

• Only if it is even

• No

• Only if it is odd

A number is divisible by 9 if the sum of its digits is:

• A prime number

• A multiple of 9

• A multiple of 6

• A multiple of 3

Is the number 8253 divisible by 9?

• Only if it is even

• No

• Only if it is odd

• Yes

Which of the following is a common factor of 36 and 54?

• 7

• 5

• 3

• 2

What are the common factors of 42 and 99?

• 1 and 2

• 1 and 3

• 2 and 3

• 3 and 6