Q: Every day in a week, Siena bookmarks 30 website pages from the research she does on her browser. If Siena has 400 bookmarked pages on her bookmarks library now, how many pages will she have in her bookmarks library at the end of March?
A: Since Siena bookmarks 30 website pages from the research she does on her browser every day, at the end of March, with 31 days, she would have bookmarked 30 * 31 = 930 pages. If Siena already has 400 bookmarked pages in her bookmarks library now, she will have 930 + 400 = 1330 pages in her bookmarks library at the end of March. The answer is 1330.

Q: When Suzy the librarian sat at her desk on Wednesday morning, she had 98 books ready for checkout. The same day, 43 books were checked out. The following day, 23 books were returned, but 5 books were checked out. On Friday, 7 books were returned. How many books did Suzy have?
A: When 43 books were checked out on Wednesday, Suzy remained with 98 - 43 = 55 books. After 23 books were returned on Thursday, she ended with 55 + 23 = 78 books. However, 5 books were checked out on the same day meaning that 78 - 5 = 73 books were left. After 7 books were returned on Friday, Suzy had 73 + 7 = 80 books. The answer is 80.

Q: James has an old printer that crumples every seventh page and blurs the ink on every third page. If he prints 42 pages, how many are neither crumpled or blurred?
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
First find the total number of pages that are crumpled: 42 pages / 7 = 6 pages. Then find the total number of pages that are blurred: 42 pages / 3 = 14 pages. Then find the number of pages that are both blurred and crumpled by finding how many numbers are less or equal to 42 and divisible by both 3 and 7: there are two, 21 and 42. Then subtract the number of crumpled and blurred pages from the total number of pages, and add the number of pages that were double - counted because they were both blurred and crumpled: 42 pages - 6 pages - 14 pages + 2 pages = 24 pages. The answer is 24.