Diagramming Solutions for PrepTest 70

Utilizing methods taught in The LSAT Trainer.

Game 1

Step  1

Per the given scenario, we can write out the six elements to be placed - U, V, W, X, Y, and Z, and lay out the six assignments to be filled, in order.

Step 2

Per the first rule, we can notate that V must go before Z.

Step 3

Per the second rule, we can notate that both W and Z go before X. We can connect this notation our notation for the first rule.

Step 4

Per the third rule, we can notate that U cannot go in any of the first three positions.

Step 5

Per the fourth rule, we can notate that Y cannot go in any of the final three positions.

Game 2

Step 1

Per the given scenario, we can write out the eight elements to be placed - M, O, P, S, T, W, Y, and Z - and create an in-out diagram with four slots in the in column, and an understanding that there may or may not be more that can go in the in column as well.

Step 2

Per the first rule, we can notate that M in leads to O out and P out. We can also notate the contrapositive that if O or P is in, M must be out.

Step 3

Per the third rule, we can notate that W in means M and Y are also in, as well as the contrapositive. We can connect these notations to our notations for the first rule.

Step 4

Per the second rule, we can notate that S in leads to both P and T being in, as well as the contrapositive. We can connect these notations to our notations for the first and third rules.

Step 4

We can notate that Z has not been mentioned in any of the given rules.

Game 3

Step 1

Per the given scenario, we can write out the five elements to be placed - H, M, R, S, and W, and we can lay out the five positions to be assigned - we can do so in a grid that allows us to track the screens in rows and the times in columns.

Step 2

Per the first rule, we can notate that W must be at some point before H.

Step 3

Per the second rule, we can notate that S cannot be show on the third screen.

Step 4

Per the third rule, we can notate that R cannot be shown on the second screen.

Step 5

Per the fourth rule, we can notate that H and M cannot be shown on the same screen.

Game 4

Step 1

Per the given scenario, we can write out the five elements to be placed - O, P, R, S, and T, and the two subset types - g and h, and we can lay out the five positions to be filled, in order.

Step 2

Per the first rule, we can place a g into the first slot.

Step 3

Per the second rule, we can place an h into the fourth slot.

Step 4

Per the third rule, we can notate that we have 3 g’s and 2 h’s.

Step 5

Per the fourth rule, we can notate that  Sh must go before O.

Step 6

Per the fifth rule, we can notate that T must go before Pg.

More Information About The Trainer
Logic Games Diagrams

These pages offer diagramming suggestions for every game that has appeared in every Logic Games section from PrepTests 52 through 81. Please keep in mind that there are many different ways to effectively diagram Logic Games, and it’s often a very subjective decision as to which inferences to notate, when to split diagrams, and so on.

One significant advantage of the Trainer diagramming methods is that they provide a universal diagramming system that you can use for any game that appears in the section. This is in contrast to most other LSAT learning systems, which separate games out into distinct categories, each with its own, and often conflicting, notational system.

General Suggestions on How to
Diagram Logic Games

1. Always read through the scenario and rules completely, and pause to mentally consider and visualize  the game, before setting pencil to paper.

2. Think of all games in terms of elements to place and positions to place them into. Nearly every game places these positions into an order, into groups, or both.

3. Whenever you find it useful, feel free to deal with the rules in an order that makes it most convenient for you to draw an effective diagram.

4. Always be on the lookout for inferences - things that you can figure out by bringing information, such as rules, together. The purpose of your diagram is to, in fact, help you uncover inferences correctly, and these inferences (more so than the rules as they are given) are what determine right and wrong for the vast majority of problems.

5. Look for opportunities to split up your game board into multiple frames - which are a set of diagrams that collectively represent all of the possibilities of a game. Most commonly, we can create frames around a very limited set of options for how to fill a certain position or positions (“either F or K must be third,” for example) or where to place an element or elements (“K must go first or last,” for example).

6. Whenever you have trouble notating a rule clearly, don’t be afraid to write it out or provide as much detail as you feel necessary. Better to be safe than overly clever.

7. When you are done with your diagram, evaluate your notations carefully and check them back against the scenario and rules as written. Make sure that you understand what your notations mean, and that they represent the given information correctly.

Table of Commonly Used
Notations

Here is a downloadable and printable infographic that includes the symbols and notations that we will most commonly utilize to set up games. Please click to open full screen.

Diagramming LSAT Logic Games Infographic

The LSAT Trainer is available on Amazon and Apple iBooks, and in your local bookstore.