June 2007 LSAT, Logic Game 4, Question 23

This question gives you a new rule. Whenever a question gives you a new rule, you should draw it, and see how it affects the existing rules.

In this case, only center 1 recycles W. Since center 1 has everything that center 2 recycles, that means center 2 only recycles two materials. That’s the only way to leave center 1 the space to recycle W as well:

We know W needs N (rule 1). So we can draw that in both centers 1 and 2. It’s in center 2 because centers 1 and 2 share their first two spaces:

We can make further deductions. P can only be in one center, so it must be in center 3. And glass can’t be in that center, so that means glass must be in centers 1 and 2:

Finally, T has to go somewhere, so they’ll fill a spot in center 3:

Center 3 isn’t closed: N could also go there. But, it doesn’t have to.

This question is asking for the possible combos. They’re:

• GNW
• GN
• PT
• PTN

(The last two are the three different possibilities for center 3)

So, A is CORRECT.