Prime Numbers and Factors

Prime numbers between 30 and 4031, 37

• 32, 35, 37

• 31, 37

• 30, 40

Prime numbers between 50 and 60

• 52, 35, 57

• 53, 59

• 55, 58

Which is not a prime number?

• 2

• 3

• 5

• 9

• 7

The factors of 18 are?

• 1, 2, 3, 6, 9

• 1, 2, 3, 6, 9 and 18.

• 18, 36

The factors of 30 are?

• 1, 2, 3, 6, 9, 30

• 1, 2, 3, 6, 9 and 15

• 1, 2, 3, 5, 6, 10, 15 and 30

• 1, 5, 10, 15 and 30

Which is not a prime number?

• 2

• 5

• 27

• 19

• 13

How many numbers between 9 and 49 are divisible by 6?

• 8 numbers

  They are: 6, 12, 18, 24, 30, 36, 42, and 48.

• 8 numbers

  They are: 12, 16, 18, 24, 30, 36, 42, and 48.

• 7 numbers.

  They are: 12, 18, 24, 30, 36, 42, and 48.

• 9 numbers

  They are: 1, 6, 12, 18, 24, 30, 36, 42, and 48.

Express 6 x 15 as a product of prime factors

• 2x3x3x5

• 2x3x15

• 6x3x5

List the prime numbers from 1-10

• 2,3,5,7,9

• 3,5,7,

• 2,3,5,9

• 2,3,5,7

Is 1 a prime number?

• No

• Yes