# What is the Least Common Multiple of 9 and 12?

Are you struggling to find the least common multiple (LCM) of two numbers? Let’s dive into the world of mathematics and explore how to find the LCM of 9 and 12.

## Understanding the LCM of 9 and 12

The LCM of 9 and 12 is the lowest possible common number that is divisible by both 9 and 12. In this case, the LCM is 36.

To find the LCM, we need to consider the multiples of each number. The multiples of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, and so on. Similarly, the multiples of 12 are 12, 24, 36, 48, 60, 72, 84, 96, 108, and so on.

Among these multiples, the common numbers are 36 and 72, which are divisible by 9 and 12, respectively. However, we need to focus on the lowest common number, which is 36. Therefore, the LCM of 9 and 12 is 36.

## Methods to Find the LCM of 9 and 12

There are three different methods for finding the LCM of 9 and 12:

### Prime Factorization Method

The prime factorization method is one approach to finding the LCM. Follow these steps:

1. Find the prime factors of 9 and 12 using the repeated division method.
2. Write all the prime factors in their exponent forms and multiply the prime factors with the highest power.
3. The final result after multiplication will be the LCM of 9 and 12.

Using the prime factorization method, the LCM of 9 and 12 can be calculated as:

• Prime factorization of 9: 3 * 3 = 3^2
• Prime factorization of 12: 2 2 3 = 2^2 * 3
• LCM of 9 and 12: 2^2 * 3^2 = 36

### Listing Method

The listing method is another way to determine the LCM. Follow these steps:

1. Write down the first few multiples of 9 and 12 separately.
2. Identify the multiples that are common to both numbers, such as 9 and 12.
3. Take out the smallest common multiple among all the common multiples. This will be the LCM of 9 and 12.

Using the listing method, we can find the LCM of 9 and 12 as:

• Multiples of 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, and so on.
• Multiples of 12: 12, 24, 36, 48, 60, 72, 84, 96, 108, and so on.
• The least common multiple is 36, making it the LCM of 9 and 12.

### Division Method

The division method is also a viable option for finding the LCM. Follow these steps:

1. Write the numbers for which you need to find the LCM, which are 9 and 12 in this case, separated by commas.
2. Find the smallest prime number that is divisible by either 9 or 12.
3. If any of the numbers is not divisible by the respective prime number, write that number in the next row and proceed further.
4. Continue dividing the numbers obtained after each step by the prime numbers until you get the result as 1 in the entire row.
5. Multiply all the prime numbers, and the final result will be the LCM of 9 and 12.

Using the division method, the LCM of 9 and 12 can be found as:

Prime Factors First Number Second Number
2^2 * 3^2 9 12

Therefore, the LCM of 9 and 12 is 36.

## Formula for Finding the LCM of 9 and 12

The LCM of 9 and 12 can be calculated using the formula: LCM(9, 12) = (9 * 12) / HCF(9, 12), where HCF is the highest common factor or the greatest common divisor of 9 and 12.

Another formula that can be used to find the LCM of 9 and 12 is 9 12 = LCM(9, 12) HCF(9, 12). This means that the product of 9 and 12 is equal to the product of their LCM and HCF.

## FAQs

Q: If the LCM of two numbers is 36, HCF is 3, and one of the numbers is 12, how do I find the other number?

A: By applying the formula product of two numbers = LCM HCF, you can solve the problem. Assuming one of the numbers is 12, the LCM is 36, and the HCF is 3. Let the other number be x. Using the formula, we have 12 x = 36 * 3. Simplifying this equation, we find x = 9. Hence, the other number is 9.

There you have it! Now you know how to find the LCM of 9 and 12 using multiple methods. If you’re looking to enhance your math skills, consider exploring Wiingy’s Online Math Tutoring Services, where you can learn from top mathematicians and experts.

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Remember, math is all about finding creative solutions and unlocking the beauty of numbers. Keep exploring and enjoy the journey of learning!

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