Find the LCM of 30 and 40
Solution
2

30

40

2

15

20

2

15

10

3

15

5

5

5

5


1

1

LCM = 2 x 2 x 3 x 5 x 11
= 4 x 165
(because 3 x 5 x 11=165)
= 330
Hence LCM is 330