Factors and Multiples

Sarah is counting by 8s. She lists the numbers 8, 16, and 24. Some other numbers Sarah could list are ________ and ________.

• 2 and 4

• 16 and 32

• 32 and 64

• 40 and 49

List the first 5 MULTIPLES of 3

• 3, 6 10, 15, 20
• 1, 3, 2, 6, 4
• 3, 6, 9, 12, 15
• 6, 9, 12, 15, 18

A PRIME NUMBER is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

List the first 5 multiples of 8

• 1, 2, 4, 8
• 8, 16, 25, 32, 40
• 8, 16, 24, 32, 40
• 8, 16, 24, 31, 40

Which number is a factor of 6?

• 12
• 2
• 8
• 10

Which number is a multiple of 5?

• 16
• 29
• 40
• 32

List all the factors for 50

• 1,2,3,4,5,6,7,8
• 2,4,6,8,10
• 5,10,15,20,25,30,35,40,45,50
• 1,2,5,10,25,50

Find the HCF of 40 and 60?

• 10
• 20
• 30
• None of the above

Find the LCM of 12 and 16...

• 48

• 36

• 64

• 96

The least common multiple of 12, 30, and 40 is…

• 40

• 60

• 120

• 160