# Calculate the LCM of 7,14 and 21?

LCM of any three is the value which is evenly divisible by the three given numbers. The full form of LCM is Least Common Multiple.

## Answer: The LCM of 7,14 and 21 is 42

Let's find the LCM of 7,14 and 21 by listing common multiples

## Explanation:

Multiples of 7: 7, 14, 21, 28, 35, 42

Multiples of 14: 14, 28, 42

Multiples of 21: 21, 42

The smallest multiple common to 7,14 and 21 is 42

Thus, LCM(7,14,21) = 42

Now, let's use another method which is known as common division to calculate their LCM

The numbers 7,14 and 21 are simultaneously divided until the remainder is 0

The LCM is calculated by multiplying all the factors as shown above