Table of Contents

## What is the LCM of 8 and 12 using factor tree?

What is the LCM of 8 and 12? Answer: LCM of 8 and 12 is 24.

### What is the LCM of 4 and 16 using factor tree?

What is the LCM of 4 and 16? Answer: LCM of 4 and 16 is 16.

**What is the GCF of 9 and 18?**

9

Answer: GCF of 9 and 18 is 9.

**What is the HCF of 12?**

Factors of 12 = 1, 2, 3, 4, 6 and 12. Factors of 18 = 1, 2, 3, 6, 9 and 18. Therefore, common factor of 12 and 18 = 1, 2, 3 and 6. Highest common factor (H.C.F) of 12 and 18 = 6 [since 6 is the highest common factor].

## What is the HCF of 4 and 9?

Answer: HCF of 4 and 9 is 1.

### What is the LCM of 15 and 9?

45

Answer: LCM of 9 and 15 is 45.

**How do you find LCM using factor tree?**

The LCM, least common multiple, is the smallest value that two or more numbers multiply into. Let’s find the LCM of 120 and 45. Begin by using factor trees to write out each number’s prime factorization.

**How do you calculate least common multiple?**

One way to find the least common multiple of two numbers is to first list the prime factors of each number. Then multiply each factor the greatest number of times it occurs in either number. If the same factor occurs more than once in both numbers, you multiply the factor the greatest number of times it occurs.

## How do you calculate factor tree?

Making a Factor Tree Write the number at the top of your paper. Find a pair of factors. Break down each set into its own factors. Repeat until you reach nothing but prime numbers. Identify all of the prime numbers. Write out the prime factor in equation form. Check your work.

### How do you calculate LCM and GCF?

To find LCM multiply the factors in all three sections of the Venn Diagram 3 x 2 x 2 x 2 x 2 x 2 = 96 The LCM of 12 and 32 is 96 To find GCF multiply the factors in the center of the Venn Diagram 2 x 2 = 4 The GCF of 12 and 32 is 4. 5. Let’s Try Some! Use prime factorization to find LCM and GCF of 15 and 6.