## Q20

ManhattanPrepLSAT2
Atticus Finch

Posts: 303
Joined: July 14th, 2009

### Q20

Here are two possible solutions for this problem -- one for if you used frames, one for if you did not.
Attachments
Slide2.jpg
Without frames
Slide1.jpg
With frames

jthor81
Vinny Gambini

Posts: 1
Joined: October 26th, 2016

### Re: Q20

Could anyone explain why the top shelf can only have two places? The rule is it has to be less than the bottom shelf.

I found this puzzle really hard.

LauraM319
Vinny Gambini

Posts: 1
Joined: November 11th, 2018

This post thanked 1 time.

### Re: Q20

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.