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.