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To find the GCF of two (or more) numbers, factor them , and see which numbers are common to both strings of numbers, and reduce the 'string' to '1'.
Hence
2)42
3)21
7)7 = 1
& 2)72
2)36
2)18
3)9
3)3 = 1
Hence one lot of '2' is common to both numbers.
Similarly one lot of '3' is common to both numbers.
Hence 2 x 3 = 6 is the GCF of '42' & '72'.
NB THe other 2's and the '3' and '7' are NOT common factors as they do NOT appear in both strings of numbers.
What else can I help you with?
What is the greastest common factor of 42 70 84?
The GCF is 14.
Is 3 a factor of 42?
No, 42 is a multiple of 3. 3 is a factor of 42.
What is the greatest common factor of 3 and 42?
Since 3 is a factor of 42, it is automatically the GCF.
What is the factors of 36 and 42?
factor of 36- 1,2,3,4,6,9,12,18,36 factor of 42- 1,2,3,6,7,14,21,42
What is the greatest common factor of 42 and 66?
The greatest common factor of 42 and 66 is 6.6
What is the greastest common factor for 12 and 42?
6
What is the greastest common factor of 42 and 72?
It is: 6
What is the greastest common factor of 42 and 98?
The GCF is 14.
What is the greastest common factor of 42 70 84?
The GCF is 14.
What is the GCF of 42 and72?
The GCF is 6.
What is the greatest commn foactor of 21 and 42?
21. GCF means what is the greatest number that goes into both, and 21*2=42.
Is 28 a factor of 42?
28 is not a factor of 42.
Is 6 not a factor of 42?
You are incorrect!!!! Six(6) is a factor of '42'. Remember your 6 times table (multiplication. 6 x 0 = 0 6 x 1 = 6 6 x 2 = 12 6 x 3 = 18 6 x 4 = 24 6 x 5 = 30 6 x 6 = 36 6 x 7 = 42 ( The answer to your problem(. 6 x 8 = 48 6 x 9 = 54 6 x 10 = 60 6 x 11 = 66 6 x 12 = 72 et seq.,
Is every factor of 4 also a factor of 42?
No, 4 is not a factor of 42.
Is 3 a factor of 42?
No, 42 is a multiple of 3. 3 is a factor of 42.
Is 8 a factor of 42?
8 is not an integer factor of 42.
Is 42 a proper factor?
It can be. 42 is a proper factor of 84.
