Divisibility Patterns

Which number is not a factor of both 36 and 84?

• 2

• 3

• 5

• 6

Which factors do 24 and 36 have in common?

• 1, 2, 3, 4

• 1, 2, 3, 4, 6, 12

• 1, 2, 3, 4, 8, 12

• 1, 2, 3, 4, 12

• 1, 2, 3, 4, 8, 12, 18

Using the divisibility rules chart, determine if 129 is prime or composite?

• Prime

• Composite

Using the divisibility rules chart, determine if 318 is prime or composite?

• Composite

• Prime

You have two numbers, 20 and 100. What number can you divide out of both of them?

• 3

• 10

• 9

• 15

What is the divisibility rule for 5?

• The digits must add up to 10.

• The last digit needs to be a 5 or 0.

• The last digit can only be a 5.

• The sum of the digits need to be divisible by 5.

What is the divisibility rule for 3?

• Add up the digits. The sum must be even and divisible by 3.

• The digits must add up to 9.

• The last digit must be a 3.

• Add up the digits. The sum must be divisible by 3.

Is 81 divisible by 3?

• Yes

• No

What is the divisibility rule for 4?

• The sum of the digits must be a multiple of 4

• The last two digits must form a number that is a multiple of 4

• The number must be divisible by 2 and 3.

• The number must end in 0, 2, or 4

252 is divisible by 9 because:

• The digits add up to 18.

• The sum of the digits is divisible by 9.

• It's even and the sum of the digits is divisible by 3.

• The sum of the digits is even.