Find the GCF 70 , 21

Math
70 , 21
Find the common factors for the numerical part:
70,21
The factors for 70 are 1,2,5,7,10,14,35,70.
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The factors for 70 are all numbers between 1 and 70, which divide 70 evenly.
Check numbers between 1 and 70
Find the factor pairs of 70 where x⋅y=70.
xy170235514710
List the factors for 70.
1,2,5,7,10,14,35,70
1,2,5,7,10,14,35,70
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
List all the factors for 70,21 to find the common factors.
70: 1,2,5,7,10,14,35,70
21: 1,3,7,21
The common factors for 70,21 are 1,7.
1,7
The GCF (HCF) of the numerical factors 1,7 is 7.
7
Find the GCF 70 , 21

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