in earlier question we were only dealing with variable p
in this case we have two variables p and q
we will not take the LCM

in earlier question we have p divisible by 14 and 12
14 = 2*7
12 = 2*2*3
why we need the LCM because the 2 is common in both
84 = is divisible by 14 and 12

example we have number x= 30
30 = > 2*3*5
30 is divisible by 6
30 is also divisible by 10
so we cannot say x is divisible by 6*10 = 60
2 is common in both we are writing it twice but in factors its just one term

pq in this case are two separate numbers will not take the LCM
p is divisible by 14 and q= 12
pq will be at least divisible by 14*12 = 168

example p = 2 and q = 6(2*3)
pq will be divisible by 2*6 = 12 or 2*2 = 4 or 2*3 = 6

Thanks Fiza