Find the GCF 40 , 60 , 80 , 100

Math
40 , 60 , 80 , 100
Find the common factors for the numerical part:
40,60,80,100
The factors for 40 are 1,2,4,5,8,10,20,40.
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The factors for 40 are all numbers between 1 and 40, which divide 40 evenly.
Check numbers between 1 and 40
Find the factor pairs of 40 where x⋅y=40.
xy14022041058
List the factors for 40.
1,2,4,5,8,10,20,40
1,2,4,5,8,10,20,40
The factors for 60 are 1,2,3,4,5,6,10,12,15,20,30,60.
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The factors for 60 are all numbers between 1 and 60, which divide 60 evenly.
Check numbers between 1 and 60
Find the factor pairs of 60 where x⋅y=60.
xy160230320415512610
List the factors for 60.
1,2,3,4,5,6,10,12,15,20,30,60
1,2,3,4,5,6,10,12,15,20,30,60
The factors for 80 are 1,2,4,5,8,10,16,20,40,80.
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The factors for 80 are all numbers between 1 and 80, which divide 80 evenly.
Check numbers between 1 and 80
Find the factor pairs of 80 where x⋅y=80.
xy180240420516810
List the factors for 80.
1,2,4,5,8,10,16,20,40,80
1,2,4,5,8,10,16,20,40,80
The factors for 100 are 1,2,4,5,10,20,25,50,100.
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The factors for 100 are all numbers between 1 and 100, which divide 100 evenly.
Check numbers between 1 and 100
Find the factor pairs of 100 where x⋅y=100.
xy11002504255201010
List the factors for 100.
1,2,4,5,10,20,25,50,100
1,2,4,5,10,20,25,50,100
List all the factors for 40,60,80,100 to find the common factors.
40: 1,2,4,5,8,10,20,40
60: 1,2,3,4,5,6,10,12,15,20,30,60
80: 1,2,4,5,8,10,16,20,40,80
100: 1,2,4,5,10,20,25,50,100
The common factors for 40,60,80,100 are 1,2,4,5,10,20.
1,2,4,5,10,20
The GCF (HCF) of the numerical factors 1,2,4,5,10,20 is 20.
20
Find the GCF 40 , 60 , 80 , 100

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