Question

What is the LCM of $10,15,20$ and $30$?

Answer 1

Find the LCM of $10,15,20$ and $30$.

LCM of two or more is the smallest non-zero common multiple of the numbers.

Multiples of $10$ are $10,20,30,40,50,60,...$

Multiples of $15$ are $15,30,45,60,...$

Multiples of $20$ are $20,40,60,...$

Multiples of $30$ are $30,60,90,...$

LCM of $10,15,20,30$ is $60$.

Hence, LCM of $10,15,20$ and $30$ is $60$.