Factors, Multiples, Prime and Composite

Which list shows all of the factors of 25?

• 1, 3, 5, 6, 15, 25

• 25, 50, 75, 100

• 1, 5, 25

• 1, 2, 5, 10, 25

Which list shows multiples of 20?

• 1, 2, 4, 5, 10, 20

• 20, 40, 60, 80, 100

• 20, 30, 40, 50, 60

• 1, 2, 3, 4, 5, 8, 9, 10, 20

Select ALL of of the factors of 15

• 1

• 2

• 3

• 5

• 15

Which list shows all of the common factors of 24 and 15?

• 1, 3

• 3, 5, 12

• 1, 5

• 1, 2, 6

Which number is NOT a factor of 28?

• 1

• 28

• 3

• 14

Which list shows common multiples of 10 and 15?

• 10, 15, 20, 30

• 10, 20, 30

• 1, 5

• 30, 60, 90

Is 31 prime or composite?

• Prime

• Composite

Is 73 prime or composite?

• Prime

• Composite

Is 51 prime or composite?

• Prime

• Composite

Brad rides his bike every 2 days. Marsha rides her bike every 5 days. They both ride their bikes on June 10th. What is the next day they will both ride their bikes?

• June 20

• June 15

• June 12

• June 30