LCM and HCF Skills

Find the LCM of 12 and 18.

• 36

• 42

• 30

• 24

Find the HCF of 24 and 36.

• 6

• 18

• 12

• 30

Use prime factorization to find the LCM of 15 and 20.

• 60

• 25

• 30

• 45

Solve: John has 24 apples and Mary has 36 apples. What is the least number of apples they can share equally?

• 6

• 12

• 10

• 18

Solve: A garden has rows of 18 flowers and 24 flowers. What is the maximum number of flowers they can plant in a row without any flowers left over?

• 6

• 10

• 8

• 4

Find the LCM of 8, 12, and 16.

• 32

• 48

• 24

• 40

Find the HCF of 30, 45, and 75.

• 15

• 20

• 10

• 25

Use prime factorization to find the LCM of 21 and 28.

• 56

• 35

• 42

• 84

Solve: A factory produces boxes of 36 and 48. What is the smallest number of boxes they can pack with the same number of items?

• 120

• 72

• 144

• 96

Solve: A classroom has 30 students and 45 students. What is the largest number of students they can divide into equal groups?

• 25

• 10

• 15

• 20