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

• 3, 5, 7

• 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 number is neither prime nor composite?

• 1

• 2

• 3

• 4

Four students each made a list of prime numbers. Eric: 5, 7 17, 23 Maya: 3, 5, 13, 17 Bella: 2, 3, 17, 19 Joan: 7, 11, 13, 21 Who made an error and included a composite number?

• Eric

• Maya

• Bella

• Joan

Is 100 a prime or composite number?

• Prime

• Composite

which list below has only composite numbers?

• 2, 4, 6

• 3, 5, 7

• 4, 6, 8

• 10, 5, 3

Randy's house number is a composite number. Which of the following could be Randy's house number?

• 11

• 15

• 7

• 13

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.