Understanding Prime Factorization

What is a prime number?

• A number that can only be divided by 1

• A number that can be divided by numbers other than 1 and itself

• A number with more than two factors

• A number with exactly two factors: 1 and itself

Tags

CCSS.4.OA.B.4

Which of the following is NOT a prime number?

• 5

• 4

• 2

• 3

Tags

CCSS.4.OA.B.4

Which number is a factor of every number?

• 2

• 1

• 4

• 3

Tags

CCSS.4.OA.B.4

Which of the following numbers is prime?

• 15

• 18

• 20

• 11

Tags

CCSS.4.OA.B.4

What do you get when you multiply 2 by 2?

• 2

• 8

• 4

• 6

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CCSS.3.OA.C.7

Which of the following is a composite number?

• 4

• 2

• 3

• 7

Tags

CCSS.4.OA.B.4

What makes a number a composite number?

• It is a prime number

• It cannot be divided

• It is divisible by numbers other than 1 and itself

• It has only two factors

Tags

CCSS.4.OA.B.4

What is the prime factorization of 12?

• 2 × 2 × 2

• 3 × 4

• 2 × 3 × 3

• 2 × 2 × 3

How can 4 be factored into prime numbers?

• 2 × 2

• 1 × 4

• 2 × 3

• 3 × 3

Tags

CCSS.4.OA.B.4

What is the prime factorization of 42?

• 2 × 3 × 7

• 2 × 2 × 3

• 3 × 3 × 7

• 2 × 2 × 7