# What is the LCM of 63 and 21?

A number that is found to be the lowest or smallest and perfectly divisible by the given numbers would be considered as their LCM.

## Answer: LCM of 63 and 21 is equal to 63

Lets see how to find the LCM of 63 and 21

## Explanation:

Lowest Common Multiple: Lowest Common Multiple is a number which is found to be the smallest and exactly divisible by the given numbers.

### Methods to Find the LCM of 63 and 21

Let us use the following methods to find the LCM of 63 and 21

### LCM of 63 and 21: Formula Method

Formula to obtain LCM: LCM(a,b) = ( a × b) / GCF (a,b)

The Greatest Common Factor(GCF) of (63, 21) = 21

Therefore

LCM of 63 and 21 = (63 × 21) / 21

= 63

LCM of 63 and 21: 63

### LCM of 63 and 21: Common Division Method

Here in this division method, we divide the numbers simultaneously with prime numbers and stop it when we don't have a prime number to divide the given numbers.