Find the greatest common factor of 8 and 24 .

The greatest common factor (GCF) of 8 and 24 is 8! You can find the GCF by listing the factors of both numbers. For 8, the factors are 1, 2, 4, and 8. For 24, they are 1, 2, 3, 4, 6, 8, 12, and 24. The largest factor they have in common is 8.

To further solidify this knowledge, remember that finding the GCF can also be done using the prime factorization method. For 8, its prime factors are 2 x 2 x 2 (or 2³). For 24, the prime factorization is 2 x 2 x 2 x 3 (or 2³ x 3). By identifying the lowest powers of all common prime factors—in this case, 2³—you can see why the GCF is 8!