Divisibility Rules Explained

The video tutorial explains how to determine if a number is divisible by 2, 3, 5, 6, 9, or 10. It covers the rules for each, such as checking if the last digit is even for divisibility by 2, summing the digits for divisibility by 3 and 9, and checking the last digit for divisibility by 5 and 10. The tutorial includes examples to illustrate these rules and concludes with a prompt for further learning in pre-algebra topics.

How can you tell if a number is divisible by 2?

• If the sum of the digits is even

• If the number ends in 5

• If the last digit is odd

• If the last digit is even

What is the rule for determining if a number is divisible by 3?

• The number must be even

• The sum of the digits must be divisible by 3

• The number must end in 0

• The last digit must be 3

How do you know if a number is divisible by 9?

• The number must end in 0

• The number must be odd

• The sum of the digits must be divisible by 9

• The last digit must be 9

What is the rule for determining if a number is divisible by 5?

• The number must be odd

• The sum of the digits must be 5

• The number must be even

• The number must end in 0 or 5

For a number to be divisible by 6, it must be divisible by which two numbers?

• 2 and 4

• 3 and 5

• 2 and 3

• 4 and 5

What is the rule for determining if a number is divisible by 10?

• The number must end in 5

• The number must be even

• The sum of the digits must be 10

• The number must end in 0

Is the number 315 divisible by 3?

• No, because it is an odd number

• No, because the sum of the digits is not divisible by 3

• Yes, because the sum of the digits is divisible by 3

• Yes, because it ends in 5

Is the number 750 divisible by 10?

• No, because it is an odd number

• Yes, because it is an even number

• No, because it ends in 5

• Yes, because it ends in 0

Is the number 158 divisible by 3?

• No, because the sum of the digits is not divisible by 3

• Yes, because it ends in 8

• No, because it is an even number

• Yes, because the sum of the digits is divisible by 3

Is the number 189 divisible by 9?

• Yes, because the sum of the digits is divisible by 9

• No, because it is an odd number

• No, because the sum of the digits is not divisible by 9

• Yes, because it ends in 9