Required Mathematical Intelligence

Chapter 81
There is a very wonderful book in the ancient bookstore, 200 pages in total. Mr. A bought it. When watching it, Mr. A first removed the 3 pages from the 12rd to the 10th pages that he was interested in, and the rest was 190 pages.Afterwards, he removed 56 pages from page 75 to page 20 in total.Excuse me, how many pages are left in this book?
[答案：既然A先生拆下第3页到第12页后剩下190页。我们应该依此推算出本书的编排，也就是3页、4页是一张纸，5页、6页是一张纸……那么A先生第二次拆下第56～75页，实际上拆了55～76页，因为55页和56页，75页和76页是印在同一张纸上的，不可能分开。所以这本书还剩下190-22=168（页）]
(End of this chapter)