What is the greatest common factor of 40 60 and 90?

Answer 1

To find the greatest common factor (GCF) of 40, 60, and 90, you need to determine the largest number that divides evenly into all three numbers. First, list the factors of each number: 40 (1, 2, 4, 5, 8, 10, 20, 40), 60 (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60), and 90 (1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90). The GCF of 40, 60, and 90 is 10, as it is the largest number that is a factor of all three numbers.

Answer 2

The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.

The greatest common factor of 40, 60, and 90 is 10