# How do you calculate least common multiple?

Table of Contents

## 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 to find LCM fast?**

To get the LCM , multiply all of the outer numbers. That means you multiply the numbers you pulled out on the left (2 and 5), and also multiply the numbers at the bottom (1, 7 and 2). Ignoring the meaningless 1, you have: 2 x 5 x 7 x 2 = 140, and that’s the LCM.

### What is the LCM of 4 5 6?

The Least Common Multiple (LCM) for 4, 5 and 6, notation LCM (4,5,6), is 60 Solution by Using the Division Method: This method consists of grouping by separating the numbers that will be decomposed on the right side by commas while on the left side we put the prime numbers that divide any of the numbers on the right side.

**How to figure out LCM?**

List all the prime numbers found, as many times as they occur most often for any one given number. Multiply the list of prime factors together to find the LCM . The LCM (a,b) is calculated by finding the prime factorization of both a and b. Use the same process for the LCM of more than 2 numbers.

## When do you use LCM?

LCM is also used to add or subtract any two fractions when the denominators of the fractions are different. While performing any arithmetic operations such as addition, subtraction with fractions, LCM is used to make the denominators common.

**How do you calculate the lowest common denominator?**

To get the lowest common denominator of the given numbers, please apply the LCM function. Put your numbers in cells of your worksheet, and enter this formula: =LCM(A1:A4) in a blank cell, see screenshot: And then press Enter key, you will calculate the lowest common denominator of the numbers in the cells range.

### How to find LCM of 2 numbers?

The product of HCF of two numbers and the LCM of two numbers is equal to the product of two numbers. Therefore, the formula to find LCM of two numbers is, LCM of two numbers = product of two numbers ÷ HCF of two numbers.

How to Find LCM by Listing Multiples

- List the multiples of each number until at least one of the multiples appears on all lists.
- Find the smallest number that is on all of the lists.
- This number is the LCM.

**What is the least common multiple of 345?**

The factors of 345 are 1, 3, 5, 15, 23, 69, 115, 345 and factors of 144 are 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144. Therefore, the Lowest Common Multiple (LCM) of 345 and 144 is 16560 and Highest Common Factor (HCF) of 345 and 144 is 3.

## What is the LCM of 245 and 385?

The LCM of 245 and 385 is 2695.

**What is the HCF of 342?**

Solution: The factors of 342 are 1, 2, 3, 6, 9, 18, 19, 38, 57, 114, 171, 342 and factors of 281 are 1, 281. Therefore, the Least Common Multiple of 342 and 281 is 96102 and Highest Common Factor (HCF) of 342 and 281 is 1.

### What is the Least Common Multiple of 2 3 4?

12

What is the LCM of 2, 3, and 4? Answer: LCM of 2, 3, and 4 is 12.

**IS 345 a perfect square?**

Is the number 345 a Perfect Square? The prime factorization of 345 = 31 × 51 × 231. Here, the prime factor 3 is not in the pair. Therefore, 345 is not a perfect square.

## What are the common factors of 342?

Factors of 342

- All Factors of 342: 1, 2, 3, 6, 9, 18, 19, 38, 57, 114, 171 and 342.
- Prime Factors of 342: 2, 3, 19.
- Prime Factorization of 342: 21 × 32 × 191
- Sum of Factors of 342: 780.

**What is the table of 342?**

342 Times Table

Multiplication Table : 342 | |
---|---|

6 x 342 | 2052 |

7 x 342 | 2394 |

8 x 342 | 2736 |

9 x 342 | 3078 |