Question

find the lasa of 60,90 ,120,​

Answer 1

Answer:

Answer is 360.

Multiples of 60:- 60,120,180,240,300,360 …

Multiples of 90:- 90,180,270,360,450….

Multiples of 120:- 120,240,360,480…

So clearly the lowest common multiple of all three is 360.

Easiest method is write the multiples of the largest number first and then check its multiples with the rest.

Another method is prime factorising all the three numbers and then multiplying the factors will give you the LCM.