Prime and Composite Numbers and Factors

List all the factors of the number 27 from least to greatest.

Remember to list them with a comma and a space between each number.

Example: 1, 2, 3, 4

List all the factors of the number 23 from least to greatest.

Remember to list them with a comma and a space between each number.

Example: 1, 2, 3, 4

List all the factors of the number 16 from least to greatest.

Remember to list them with a comma and a space between each number.

Example: 1, 2, 3, 4

List all the factors of the number 20 from least to greatest.

Remember to list them with a comma and a space between each number.

Example: 1, 2, 3, 4

Prime numbers have:

• Exactly 2 factors

• 2 pairs of factors

• More than 2 factors

• 1 factor

is 5 prime or composite?

• prime

• composite

What is a factor?

• "Factors" are the numbers you multiply to get another number. For instance, factors of 15 are 3 and 5, because 3×5 = 15

• A factor is a number written in word form

• "Factors" tell you facts about all the numbers in the world

Which number is a factor of 10?

• 3

• 5

• 4

• 8

Which number is NOT a factor of 10?

• 1

• 2

• 3

• 5

Is 3 a factor of 12?

• yes

• no