Class Practice - Finding the GCF

Quiz
•
Mathematics
•
6th Grade
•
Hard

JC Vazquez Bou
Used 1+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
What is the GCF of 24 and 36?
6
18
24
12
Answer explanation
To find the GCF of 24 and 36, list the factors: 24 (1, 2, 3, 4, 6, 8, 12, 24) and 36 (1, 2, 3, 4, 6, 9, 12, 18, 36). The largest common factor is 12, making it the GCF.
2.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Find the GCF of 18, 24, and 30.
18
12
24
6
Answer explanation
To find the GCF of 18, 24, and 30, we list their factors: 18 (1, 2, 3, 6, 9, 18), 24 (1, 2, 3, 4, 6, 8, 12, 24), and 30 (1, 2, 3, 5, 6, 10, 15, 30). The largest common factor is 6.
3.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
A gardener has 36 red roses and 48 yellow roses. What is the greatest number of bouquets he can make if each bouquet has the same number of roses?
6
12
24
18
Answer explanation
To find the greatest number of bouquets, we need the greatest common divisor (GCD) of 36 and 48. The GCD is 12, meaning the gardener can make 12 bouquets with each containing 3 red and 4 yellow roses.
4.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
The lengths of three pieces of ribbon are 12, 18, and 30 inches. What is the GCF of these lengths?
12
18
24
6
Answer explanation
To find the GCF of 12, 18, and 30, we list the factors: 12 (1, 2, 3, 4, 6, 12), 18 (1, 2, 3, 6, 9, 18), and 30 (1, 2, 3, 5, 6, 10, 15, 30). The largest common factor is 6.
5.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
What is the GCF of 32 and 48?
8
16
4
12
6.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Two friends are making gift bags. One has 20 candies and the other has 30 candies. What is the maximum number of bags they can make with the same number of candies in each?
15
25
10
5
Answer explanation
To find the maximum number of bags with the same number of candies, we need the greatest common divisor (GCD) of 20 and 30. The GCD is 10, meaning they can make 10 bags with 2 candies each.
7.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Calculate the GCF of 15 and 25.
15
20
10
5
Answer explanation
The GCF (Greatest Common Factor) of 15 and 25 is 5, as it is the largest number that divides both without leaving a remainder. The factors of 15 are 1, 3, 5, 15 and for 25 are 1, 5, 25. The common factor is 5.
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