Factors and Multiples

What is the greatest common factor of 20 and 30?

• 60

• 5

• 10

• 30

What is the PRIME factorization of 24?

• 2³ x 3

• 2 x 2 x 3

• 6 x 4

• 3² x 2 x 2

During a performing arts festival, students from elementary and middle schools will be grouped together for various performances. There are 32 elementary students and 40 middle-school students. The arts director wants identical groups for the performances. What is the largest number of groups that can be formed?

• 640

• 32

• 16

• 8

A florist orders sunflowers every 6 days, and daisies every 4 days. How many days will pass until the next time she orders both kinds of flowers on the same day?

• 12 days

• 2 days

• 24 days

• 4 days

1, 2, 3 and 6 are factors of 6.

• True

• False

Seven is a factor of ...

• 14, 27, and 72

• 21, 28, and 42

• 1, 7, and 14

• 37, 47, and 57

Which one below is a multiple of 6

• 7

• 12

• 9

• 10

What the multiples of 5?

• 10,12

• 5,10,15,20

• 99

• 101

Which number is NOT a factor of 28?

• 2

• 7

• 4

• 6

Which number is NOT a MULTIPLE of 8?

• 16

• 36

• 48

• 72