LCM and GCF

Which of the following is a prime number?

• 10

• 12

• 17

• 21

Tags

CCSS.4.OA.B.4

Which of these numbers is a composite number?

• 6

• 7

• 11

• 17

Tags

CCSS.4.OA.B.4

Find the LCM of 7 and 8.

Tags

CCSS.6.NS.B.4

Find the LCM for 6 and 8.

Tags

CCSS.6.NS.B.4

Which of the following shows the prime factorization for 50?

• 2 x 2 x 5

• 5 x 10

• 5 x 5 x 5

• 2 x 5 x 5

Find the prime factorization of 32.

• 2 x 2 x 2

• 2 x 2 x 2 x 2

• 2 x 2 x 2 x 2 x 2

• 2 x 2 x 8

Tags

CCSS.6.EE.A.3

Alena has a bunch of blocks on her desk. They can be divided evenly into groups of 7 or groups of 5. How many blocks are on Alena's desk?

• 12

• 35

• 57

• 88

Tags

CCSS.6.NS.B.4

Find the GCF for 18 and 12.

Tags

CCSS.6.NS.B.4

Find the GCF for 30 and 45.

Tags

CCSS.6.NS.B.4

Find the GCF for 20 and 70.

Tags

CCSS.6.NS.B.4