Obviously, after reading a thick book and opening it, the total number of four consecutive pages is 402. What is the page number of four consecutive pages?
This is a logical question. First of all, let's make clear the difference between page two to page four and page one. On this issue, suppose that the first page is 1, and the difference between the second page and 1 is 1. The third page is 2 and the fourth page is 3. There is a difference of 6 pages from the total number of pages on the first page. So use 402-6=396 as the total page difference of 4 pages, and the result is the average sum of 4 pages. Use the average sum of 396/4=99 (get the average number of pages, that is, the first 1 page). Then add 1 page to the page difference of each page, which is the number of pages in each book. Page 1 99 Page 2 99+ 1= 100 Page 399+2 =1kloc-0/down 4 Page 99+3 = 102.