Question

what is the LCM of 9 ,12,3,15​

Answer 1

To find : LCM of $9, 12, 3, 15$

Solution :

• To find the LCM of
• $9, 12, 3, 15$  we find factors of  $9, 12, 3, 15$
• Factors of $9 = 3\times 3$
• Factors of $12 = 2\times 2\times 3$
• Factors of $3 = 3\times 1$
• Factors of $15 = 3\times 15$
• LCM = $2\times 2\times 3\times\times 3\times 5$

                $= 180$

      Hence , LCM of  $9, 12, 3, 15$ is $180$.

Answer 2

Given numbers are,

$9 ,12,3,15$

Now we have to find the LCM of given numbers.

To find the LCM of given numbers, first we have to find the prime factors of each individual numbers.

Prime factors of $9=3\times3$

Prime factors of $12=2\times2\times3$

Prime factors of $3=3$

Prime factors of $15=3\times5$

To find the LCM of $9 ,12,3,15$ we have to multiply the common prime factors once and and all the remaining factors.

We get,

$2\times2\times3\times3\times5$

$180$

Therefore,  the LCM of $9 ,12,3,15$ is $180$