Prime & Composite Numbers

Prime & Composite Numbers

​Prime Numbers

​Prime numbers are numbers greater than 1 that has exactly two factors, one, and itself.

​

​For example:

Multiplication fact of 5:

​Factors of 5:

​1, 5

​5 is a prime number.

​Composite Numbers

​Composite numbers are numbers greater than 1 that has more than two factors.

​

​For example:

​Multiplication facts of 6:

​Factors of 6:

​1, 2, 3, 6

​6 is a composite number.

​Multiplication facts of 9:

​Factors of 9:

​1, 3, 9

​9 is a composite number.

​The numbers 0 and 1 are neither prime nor composite.

Multiple Choice

Is the number 7 prime or composite?

• prime

• composite

Multiple Choice

Is the number 18 prime or composite?

• prime

• composite

Multiple Choice

Is the number 22 prime or composite?

• prime

• composite

Multiple Choice

Is the number 37 prime or composite?

• prime

• composite

Multiple Choice

Is the number 40 prime or composite?

• prime

• composite

Multiple Choice

Is the number 72 prime or composite?

• prime

• composite

Multiple Choice

Which number is a prime number?

• 17

• 18

• 21

• 15

Multiple Choice

Which number is a composite number?

• 37

• 50

• 41

• 53

Multiple Select

Which numbers are prime numbers?

• 47

• 57

• 31

• 64

Multiple Select

Which numbers are composite numbers?

• 71

• 93

• 65

• 78

Multiple Choice

Which number is a prime number?

• 80

• 79

• 95

• 72

Multiple Choice

The least prime number is 2.

• True

• False

Multiple Choice

All numbers divisible by 10 are composite numbers.

• True

• False

Multiple Choice

All odd numbers are prime numbers.

• True

• False

Multiple Choice

41, 43, and 47 are prime numbers.

• True

• False

Multiple Choice

There are no prime numbers between 90 and 100.

• True

• False