Factors and Prime Factorisation

What is the missing factor?

• 3

• 5

• 6

• 7

What are the factors of 25?

• 1, 2, 3, 5, 10, 15, 25

• 1, 5,  25

• 1, 25

• 1, 5

What are the factors of 24?

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 3, 6, 8, 24

• 1, 2, 3, 4, 6

• 1, 24

What is the prime factorization of 33?

• 33

• 11x3

• 10x3

• 3x3x3x2

What is a Prime Number?

• A number that has more than two factors

• An Odd Number

• A number that only has two factors; one and itself.

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A prime number

• has one factor

• has more than 2 factors

• has 100 factors

• has exactly 2 factors: 1 and the number

Which of the following is NOT prime?

• 29

• 23

• 17

• 39

Is 5, a prime or composite number? 

• Prime

• Composite

Is 17, a prime or composite number? 

• Prime

• Composite

Find the prime factorization of 56.

• 2x2x2x7

• 2x28

• 3x3x7