QUESTIONS 11-20, 4 MARKS EACH

19. What is the maximum value of the expression ( ) (  )  ( ) (  ) if a

different number chosen from 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 is used to fill each

bracketed space?

（A）81 （B）88 （C）91 （D）97 （E）99