Question

LCM of 15, 20 and 30 ​

Answer 1

Answer:

60

Step-by-step explanation:

15, 20, 30 by 5 which is

3, 4, 6 by 2 which is

3, 2, 3 by 2 which is

3, 1, 3 by 3 which is

1, 1, 1

LCM = 5 x 2 x 2 x 3 = 60

Answer 2

To find : LCM of $15,20,30$

Solution :

• To find the LCM of $15,20,30$   we find prime factors of $15,20,30$ .

• Prime factors of $15 = 3\times 5$

• Prime factors of $20 = 2\times 2\times 5$

• Prime factors of $30 =2\times 3\times 5$

• LCM = $2\times 2\times 3\times 5$

                $= 60$

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