Question

Find the L.C.M of 90 , 120 , 80​

Answer 1

Answer:

Step-by-step explanation:

720 is the right answer but there is no option whose value is 720

Answer 2

Given,

The LCM of $90,120,80$

We have to find the LCM given numbers

First we have to find the prime factors of each number after that take least common multiple.

Prime factors of $90$ $= 3\times3\times5\times2$

Prime factors of $120$ $= 3\times2\times2\times5\times2$

Prime factors of $80= 2\times2\times2\times5\times2$

Now,

LCM of  $90,120,80$ $= 2\times2\times2\times2\times3\times3\times5$

$=720$

Therefore, the LCM of  $90,120,80$ is $720$.