What is the LCM of 4 5 and 3

It is not necessary to break these values into their prime factors.

We can find the LCM by inspection.

3

and

5

are already prime, but we should notice that

3

,

4

and

5

do not have any common factors at all.

The LCM must be divisible by all them, so there needs to be a

3

, a

4

and a

5

.

∴

L

C

M

=

3

*

4

*

5

=

60

The LCM of any numbers is found from their product divided by any common factors to avoid duplicates.