GCF & LCM Fun: Solve Real-Life Word Problems!

1. Sarah has 24 apples and 36 oranges. What is the greatest common factor of the number of apples and oranges she has?

• 6

• 18

• 24

• 12

2. Tom is organizing his toy cars into groups. He has 18 red cars and 27 blue cars. What is the least common multiple of the number of red and blue cars?

• 72

• 36

• 54

• 45

3. A gardener is planting flowers in rows. He can plant 15 tulips or 20 daisies in each row. What is the greatest common factor of the number of tulips and daisies he can plant?

• 5

• 25

• 15

• 10

4. Two friends are making bracelets. One uses 12 beads and the other uses 16 beads. What is the least common multiple of the number of beads they are using?

• 36

• 60

• 72

• 48

5. A teacher has 30 pencils and 45 erasers. If she wants to put them into the largest possible equal groups, how many items will be in each group?

• 15

• 20

• 25

• 10

6. Lisa is baking cookies. She can make 8 chocolate chip cookies or 12 oatmeal cookies at a time. What is the greatest common factor of the number of cookies she can make?

• 10

• 4

• 6

• 2

7. A music teacher has 40 music sheets and 60 practice books. What is the least common multiple of the number of music sheets and practice books?

• 60

• 80

• 120

• 100

8. Mark is arranging his baseball cards. He has 28 cards of one team and 42 cards of another team. What is the greatest common factor of the total number of cards he has?

• 28

• 21

• 14

• 7

9. Two runners are training for a race. One runs every 15 days and the other every 20 days. How often will they run on the same day?

• 60 days

• 30 days

• 45 days

• 90 days

10. A chef is preparing meals. He can make 18 servings of pasta or 24 servings of salad. What is the least common multiple of the servings he can prepare?

• 72

• 36

• 60

• 48