Factors and Multiples

Which of the following is a factor of 12? Select all that apply.

• 12

• 2

• 24

• 3

Select all of the multiples of 8.

• 2

• 8

• 32

• 4

What is the least common multiple of 20 and 30?

• 5

• 60

• 10

• 120

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

Select all of the prime numbers.

• 3

• 9

• 29

• 2

Select all of the square numbers.

• 9

• 16

• 24

• 100

Select all of the composite numbers.

• 12

• 16

• 3

• 7