Answer:
Largest whole number that divides evenly into both numbers.
Explanation:
GCF is greatest common factor. It is also known as LCM of lowest common multiple.
It is the set of whole numbers that divides evenly into all numbers with zero remainder.
For example, three numbers are 8,12 and 20.
The factors of 8 are: 1, 2, 4, 8
The factors of 12 are: 1, 2, 3, 4, 6, 12
The factors of 20 are: 1, 2, 4, 5, 10, 20
The GCF of these three numbers is 4. 4 divides evenly into all numbers.
Hence, the correct option is (B).