### Home > CC1 > Chapter 8 > Lesson 8.1.4 > Problem8-59

8-59.

Write the prime factorization of each number listed below. Then find the least common multiple and the greatest common factor of each pair of numbers. Homework Help ✎

1. $3$ and $24$

Factor both numbers. The number or numbers they both have are the GCF.
In this case, it is $3$.

Prime factorization:
$3: 3$ (prime)

Check the multiples of the larger number, 24, until you find one divisible by the smaller number, 3.

LCM is 24.
GCF is 3.

1. $7$ and 9

Refer to the steps for part (a).

7 is a prime number, which means its only factors are 1 and itself.

1. $15$ and $12$

Refer to the steps for part (a).

LCM is $60$. Can you find the greatest common factor?