by LauraM319 Mon Dec 03, 2018 9:14 pm
I know this won't help the original poster, but in case it could help someone else:
the top shelf can only have 2 books because if the top shelf had 3 the rest could be distributed only 1 of 2 ways without violating the 2 per shelf rule.
1. Top: 3.
Middle: 3.
Bottom:2
This would violate the bottom has more than top shelf.
2. Top: 3
Middle: 2
Bottom: 3
Which also violates the bottom has more than top shelf rule.
Essentially, if the top has more than 2 books, there won't be enough books to follow the top<bottom rule and the 2 per shelf rule.