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MEAP Preparation - Grade 6 Mathematics
2.17 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 GCF for 6 and 8
6
24
2
3
Q 2
: Find the Greatest Common Factor for the numbers: 14,21
7
4
6
3
Q 3
: Find the Greatest Common Factor for the numbers: 12,18
8
9
6
7
Q 4
: Find the GCF for 10 and 20
20
2
5
10
Q 5
: Find the Greatest Common Factor for the numbers: 10,15
4
6
7
5
Q 6
: Find the GCF for 11 and 13
13
11
1
26
Q 7
: Find the GCF for 6 and 9
54
9
6
3
Q 8
: Find the GCF for 15 and 20
60
3
5
1
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