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Grade 5 - Mathematics
5.7 Greatest Common Factors - GCF
Method:
List out the factors of numbers.
Find out the common factors.
The greatest of them is the GCF.
Example
: Find GCF of 14 and 12
Factors of 14 are 1, 2, 7, 14
Factors of 12 are 1, 2, 3, 4, 6, 12
Common factors are 1,2
GCF is 2
Answer: 2
Directions:
Find the GCF of the following. Also write at least 5 examples of your own.
Q 1
: Find the Greatest Common Factor for the numbers: 10,16
2
4
6
5
Q 2
: Find the GCF for 11 and 13
11
26
1
13
Q 3
: Find the Greatest Common Factor for the numbers: 10,15
5
6
4
7
Q 4
: Find the GCF for 6 and 8
6
3
24
2
Q 5
: Find the GCF for 12 and 15
12
5
3
60
Q 6
: Find the GCF for 6 and 9
9
6
3
54
Q 7
: Find the GCF for 8 and 12
2
4
8
24
Q 8
: Find the Greatest Common Factor for the numbers: 12,28
6
3
4
5
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Question 10: This question is available to subscribers only!
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