This is an explanation of the first logic game from Section II of LSAT Preptest 65, the December 2011 LSAT.
Five students will perform in a piano recital. They are Fernando, Ginny, Hakim, Juanita, and Kevin (F, G, H, J, K). Each student will perform one piece and no two performances can overlap. You need to decide the order of their performances.
Game Setup
The setup of this game is quite simple. However, the questions make up for it. A few of the later questions are harder than normal, for a pure sequencing game.
Ok, time to make a diagram. You should always read the rules before drawing, it lets you make additional deductions.
For instance we can combine rules 1 and 3. G is before HF, which are in either order. The box with a line over it indicates HF can be reversed:
Secondly, K is before both HF and J. You can combine all three rules in one diagram:
That’s it. Of course, it’s important to know how to read this diagram.
J could go before G, for example. Even though J is to the right of G on the diagram, there’s no line connecting them.
The only rule for J is that it goes after K.
Draw a few sample orders and refer to the original rules if you’re still unfamiliar with how to read sequencing diagrams. It should become second nature to make correct scenarios.
Hint: there are LOTS of different ways to make a correct scenario. Any scenario that doesn’t violate a rule is 100% fine.
Robert says
How are you coming rule 1 and 3???????