Prime and composite

Is 5 prime or composite?

• prime, because it has one factor

• prime, because it has two factors

• composite, because it has three factors

• neither

Tags

CCSS.4.OA.B.4

Is 21 prime or composite?

• prime, because is has 2 factors

• composite, because it has 2 factors

• composite, because it has 4 factors

• neither

Tags

CCSS.4.OA.B.4

What is a prime number?

• a number with ONLY two factors

• a number with LESS THAN two factors

• a number with ONLY one factor

• a number with MORE THAN two factors

Tags

CCSS.4.OA.B.4

What is a composite number?

• a number with ONLY TWO factors

• a number with LESS THAN TWO factors

• a number with MORE THAN TWO factors

• a number with ONLY ONE factor

Tags

CCSS.4.OA.B.4

Which list has ONLY prime numbers?

• 1, 2, 3

• 2, 3, 5

• 2, 3, 4

• 2, 4, 6

Tags

CCSS.4.OA.B.4

Which list has ONLY composite numbers?

• 8, 16, 24

• 2, 4, 6

• 5, 10, 15

• 3, 6, 9

Tags

CCSS.4.OA.B.4

What are factors?

• number that are multiplied together

• prime numbers

• composite numbers

• numbers that are added together

Tags

CCSS.4.OA.B.4

Check all the correct answers.

Which of the following numbers have 2 as a factor?

• 8

• 10

• 15

• 24

Tags

CCSS.4.OA.B.4

Check all the correct answers.

Which of the following numbers have 5 as a factor?

• 15

• 20

• 25

• 32

Tags

CCSS.4.OA.B.4

Is 3 a factor of 21?

• yes

• no

Tags

CCSS.4.OA.B.4