What is the greatest common factor of 24 and 40?

The greatest common factor (GCF) of two numbers is the largest number that divides both of them without leaving a remainder.

To find the GCF of 24 and 40, we can list the factors of each number:

Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24 Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40

The common factors of 24 and 40 are 1, 2, 4, and 8. The largest of these common factors is 8.

Therefore, the greatest common factor of 24 and 40 is 8.