Find the GCF 21 , 36

Math
21 , 36
Find the common factors for the numerical part:
21,36
The factors for 21 are 1,3,7,21.
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The factors for 21 are all numbers between 1 and 21, which divide 21 evenly.
Check numbers between 1 and 21
Find the factor pairs of 21 where x⋅y=21.
xy12137
List the factors for 21.
1,3,7,21
1,3,7,21
The factors for 36 are 1,2,3,4,6,9,12,18,36.
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The factors for 36 are all numbers between 1 and 36, which divide 36 evenly.
Check numbers between 1 and 36
Find the factor pairs of 36 where x⋅y=36.
xy1362183124966
List the factors for 36.
1,2,3,4,6,9,12,18,36
1,2,3,4,6,9,12,18,36
List all the factors for 21,36 to find the common factors.
21: 1,3,7,21
36: 1,2,3,4,6,9,12,18,36
The common factors for 21,36 are 1,3.
1,3
The GCF (HCF) of the numerical factors 1,3 is 3.
3
Find the GCF 21 , 36

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