Xiao Lan was reading a storybook. The number of pages she had read before dinner was 1/5 of the number of pages she had not read. After dinner, she had read another 6 pages, which was 1/4 of the number of pages she had read.Xiaolan read a story book. The number of pages she had read before dinner was 1/5 of the number of pages she had not read. After dinner, she had read 6 pages. This was 1/4 of the number of pages she had read. Then, what was the number of pages she had not read?
The number of unread pages is the number of pages in the entire story minus the number of read pages. Therefore, the number of pages that Xiaolan had read before dinner was 1/5 of the number of pages that she had not read.
Number of pages seen = number of pages not seen × 5/4
He also knew that Xiaolan had read six pages after dinner, so he said,"
Number of pages seen = Number of pages seen + 6 = (Number of pages not seen × 5/4) + 6 (Add 6 to both sides of the equation)
The equation was simplified to:
Number of pages viewed = 26 × 5/4 + 6
= 36 + 6
= 42
Therefore, Xiaolan had read page 42 before dinner, but she hadn't read page 42-36=6.
Xiaofang was reading a novel. The number of pages she had read before dinner was one-seventh of the number she had not read. After dinner, she read another eight pages. At this time,Xiaofang read the novel as follows:
Before dinner, Xiaofang had read less than one-seventh of the novel, which was about 16 pages. Therefore, she had read less than one-seventh of the novel before dinner.
After dinner, Xiaofang read another eight pages. At this time, she had read about 1/7 + 1/8 = 1/4 of the novel. Therefore, Xiaofang read another quarter of the novel after dinner.
To sum up, Xiaofang had read 16 pages before dinner and 1/4 pages after dinner, a total of 3/4 pages.