Find the GCF 42 , 18 , 84

Math
42 , 18 , 84
Find the common factors for the numerical part:
42,18,84
The factors for 42 are 1,2,3,6,7,14,21,42.
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The factors for 42 are all numbers between 1 and 42, which divide 42 evenly.
Check numbers between 1 and 42
Find the factor pairs of 42 where x⋅y=42.
xy14222131467
List the factors for 42.
1,2,3,6,7,14,21,42
1,2,3,6,7,14,21,42
The factors for 18 are 1,2,3,6,9,18.
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The factors for 18 are all numbers between 1 and 18, which divide 18 evenly.
Check numbers between 1 and 18
Find the factor pairs of 18 where x⋅y=18.
xy1182936
List the factors for 18.
1,2,3,6,9,18
1,2,3,6,9,18
The factors for 84 are 1,2,3,4,6,7,12,14,21,28,42,84.
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The factors for 84 are all numbers between 1 and 84, which divide 84 evenly.
Check numbers between 1 and 84
Find the factor pairs of 84 where x⋅y=84.
xy184242328421614712
List the factors for 84.
1,2,3,4,6,7,12,14,21,28,42,84
1,2,3,4,6,7,12,14,21,28,42,84
List all the factors for 42,18,84 to find the common factors.
42: 1,2,3,6,7,14,21,42
18: 1,2,3,6,9,18
84: 1,2,3,4,6,7,12,14,21,28,42,84
The common factors for 42,18,84 are 1,2,3,6.
1,2,3,6
The GCF (HCF) of the numerical factors 1,2,3,6 is 6.
6
Find the GCF 42 , 18 , 84

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