A factor is a divisor - a number that will evenly divide into another number.
One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42.
The factors of 63 are 1, 3, 7, 9, 21, and 63.
The common factors are 1, 3, 7, and 21.
The greatest common factor (GCF) of 42 and 63 is 21.To find the GCF (greatest common factor) of two numbers, first prime factorize them.42 = 2*3*763 = 3*3*7The GCF must be able to contain factors such that if divided by 42 or 63, the answer will be an integer.The GCF is 21.21
The GCF is 7.
The greatest common factor of 630 , 84 = 42
The GCF is 3.
The GCF is 21.
The Greatest Common Factor of 28, 42, 63: 7
The highest common factor is 21
3The GCF is: 2121.The GCF is 21.
Answer: 7.
21
21
It is 21
The GCF is 21.
The gcf is 21
It is: 3
1 and 7
The greatest common factor is 21