To get the Least Common Multiple (LCM) of 6 and 50 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:
6: 2 3
50: 2 5 5
LCM: 2 3 5 5
The Least Common Multiple (LCM) is: 2 x 3 x 5 x 5 = 150