Find the LMC of the missing number

Question

10, 25
5
10
25
50

Find the LMC of the given number
24, 36
36
72
144
864

Answer 1

10 = 2*5
25 = 5*5

so we will need 2*5*5, which is 50
(I write down the longest list of factors, then look at the other list to see ones I have not
yet used
- so I wrote 5*5, then looking at the other I see that I already have the 5,
so I need the 2, thus 5*5*2 )

Do the other in the same way