Divisibility Rules Factors Prime and Composite Numbers

List all of the factors of 27

• 1,27

• 1,3,9,27

• 1,3,9,12,27

These numbers 14,21,28,35,42 are multiples of what number?

• 5

• 3

• 8

• 7

What are the factors of 24?

• 1,2,3,4,6,12,24

• 1,2,3,4,6,8,12,24

• 1,2,12,24

• 1,2,3,4,6,8,24

Is 64 Prime or Composite?

• Prime

• Composite

Is 61 Prime or Composite?

• Prime

• Composite

How do you know if a number is divisible by 2?

• it has a 2 as the last digit.

• It has an even number as the last digit.

• It has a 5 or a 0 as the last digit.

• If you add all the digits up the sum is divisible by 2.

What is the number 278 divisible by?

• 2,3,5,6,9,10

• 2,3,6,

• 2,5

• 2

What is the number 681 divisible by?

• 2,3,6

• 2,5,10

• 3,9

• 3

True or False- If a number is divisible by 10, it is also divisible by 5?

• True

• False

True or False - 1,110 is divisible by 2,3,5,and 10?

• True

• False