Prime vs. Composite

What is the definition of a Prime number?

• A number with only one factor.

• A number that only has one factor pair, 1 and itself.

• A number that is bigger than 1.

• A number that has more than two factors.

which list below only has prime numbers?

• 3, 5, 10

• 5, 7, 9

• 2, 3, 5

• 3, 7, 12

What is the definition of a composite number?

• a number that has more than one factor pair.

• A number that can only be made by multiplying itself by 1.

• a number that has only one factor pair.

• any number bigger than 1.

which list below has only composite numbers?

• 2, 4, 6

• 3, 5, 7

• 4, 6, 8

• 10, 5, 3

Is ten a prime number?

• Yes

• No

Is 15 a composite number?

• NO

• YES

Why is 16 a composite number? Pick two reasons.

• 16 is composite because it is even.

• 16 is composite because it is bigger than 10.

• 16 is composite because it has more than one factor pair.

What are some factor pairs for 100? Pick two.

• 100, 1

• 20, 4

• 25, 4

• 30, 3

When a number is prime, you can only make one rectangular array?

• TRUE

• FALSE

Which list has both prime and composite numbers?

• 25, 10, 3, 7

• 10, 20, 30, 40

• 2, 3, 17, 13

• 16, 18, 26, 32