June 2007 - Sec 1 - Game 4 - Q20

Moving on to question number twenty. If center 2 recycles three kinds of

materials then which one of the following kinds of materials must center 3

recycle? Alright well we know that if center 2 is recycling exactly three materials

that center 1 is going to also recycle those exact same three materials. Again,

coming directly from our second condition that anything recycled center

2 is also recycled in center three. Again, we know that plastic

cannot be in center 2 and if center 2 has exactly 3 well center 1 is going to have

those same exact three can't have more than three again maximum three. So

plastic can't be in 1. And since we have to have plastic that tells us that we must

have plastic center 3. The question is asking which one of the following

materials must center 3 recycle so (C) plastic would be the correct answer.