A: Suppose * * * has X questions, and Liangliang has 6 unfinished questions, that is, Liangliang has completed X-6 questions;

Obviously, there are still two questions left unfinished, that is, the X-2 question has been definitely finished.

Liang Liang and Ming Ming * * * have completed the problem of 192, that is, (X-6)+(X-2)= 192, and the solution is: X= 100.

So, Liang Liang completed X-6=94 questions; Obviously completed the X-2=98 problem.