Diagram

[ManhattanPrepLSAT1]

Good news. Games like this do not appear on the modern LSAT. We haven't seen the LSAC use a game like this since the late 90's. When you're working through older LSAT's I think the logical reasoning is very similar, the reading comprehension is very similar (except for the fact that it's missing a comparative reading passage), and the logic games are sometimes very similar and sometimes very different than what you're likely to encounter on your real LSAT.

I used to call a game like this an Intermediate Stage game because there will be several rounds of action and you might need to keep track of the intermediate stages along the way.

1 2 3 4
R B G O

Constraints
1 + 2 = R
2 + 3 = O
3 + 1 = B
3 + 4 = B
4 + 1 = G
4 + 2 = G

I'll walk you through #18 and #22 so you can get a feel for the game

#18
all of these answer choices except one has two of the same color.
(A) To see whether answer choice (A) works we'll keep a blue and a green and see what flasks they come from. They come from 2 and 3 respectively. So does 1 + 4 make the second blue? No! 1 + 4 makes another green, so blue, green, green would work but not blue, blue, green.
(B) blue and orange come from 2 + 4, so does 1 + 3 make a second orange? No!
(C) wait for now, too hard to test
(D) green and red come from 1 + 3, so does 2 + 4 make a second green? Yes! So (D) is correct
(E) green and orange come from 3 + 4, so does 1 + 2 make a second orange? No!


#22
1 2 3 4
R G B O

If after the first experiment there is one orange (let's make that be in the 4th flask). So, to avoid a second orange let's not mix flasks 2 + 3, so we can mix flasks 1 + 2 or 1 + 3. So, in the second experiment we could mix flasks 4 + 2 or 4 + 3. The latter option is answer choice (E).

[ManhattanPrepLSAT1]

Reposted from TLS

http://www.top-law-schools.com/forums/v ... 7#p2866767

Wow thanks man I appreciate you going over it with me. Are you sure these games don't appear on the newer lsats? I mean that would be a relief. However, wouldn't I be better off with the rare/sequencing games if I know how to do crap like this?

[ManhattanPrepLSAT1]

I'm sure that these games are gone, but I can't be sure that they're gone for good. I think it's better to be over prepared rather than under prepared. So, study away, but with less effort on things less likely.

[nazu.s.shaikh]

Thank you so much for this!

However I don't understand the question for number 18 which kind of makes it difficult to understand the reasoning you have laid out. Could you please clarify what exactly is the question asking? Are they asking for what the remaining three out of the four flasks would be?

Or maybe I misunderstood the constraints of this game.
Is each flask a certain colour? Or are the flasks separate from the colour?

[ManhattanPrepLSAT1]

The contents of each flask are colored but not the flasks themselves. When two flasks are mixed a new color results from the experiment.

So for question 18, if a student performs exactly one experiment, then that student will mix the contents of two flasks, the other two flasks will remain unchanged. The two flasks that were mixed will result in a new color and that color is determined by the constraints. We're simply asked to find the colors of the three flasks after we've conducted exactly one experiment.

[cyruswhittaker]

I've found that the games from the early LSATs are really beneficial in getting me out of a narrow approach to the games section.

They force you to think outside the box and change your approach quickly to the situation.

[interestedintacos]

I would call this game a task or operation game. It's exactly like the game where you have to make "sentences" out of 4 "words" (PT 10, Game 4). The important thing is to understand precisely what you are working with and then understand what the simple tasks (combining two entities, erasing an entity, adding an entity, switching two entities, etc.) are that you have at your disposal.

[GeneW]

Good news. Games like this do not appear on the modern LSAT. We haven't seen the LSAC use a game like this since the late 90's. When you're working through older LSAT's I think the logical reasoning is very similar, the reading comprehension is very similar (except for the fact that it's missing a comparative reading passage), and the logic games are sometimes very similar and sometimes very different than what you're likely to encounter on your real LSAT.

I used to call a game like this an Intermediate Stage game because there will be several rounds of action and you might need to keep track of the intermediate stages along the way.

1 2 3 4
R B G O

Constraints
1 + 2 = R
2 + 3 = O
3 + 1 = B
3 + 4 = B
4 + 1 = G
4 + 2 = G

I'll walk you through #18 and #22 so you can get a feel for the game

#18
all of these answer choices except one has two of the same color.
(A) To see whether answer choice (A) works we'll keep a blue and a green and see what flasks they come from. They come from 2 and 3 respectively. So does 1 + 4 make the second blue? No! 1 + 4 makes another green, so blue, green, green would work but not blue, blue, green.
(B) blue and orange come from 2 + 4, so does 1 + 3 make a second orange? No!
(C) wait for now, too hard to test
(D) green and red come from 1 + 3, so does 2 + 4 make a second green? Yes! So (D) is correct
(E) green and orange come from 3 + 4, so does 1 + 2 make a second orange? No!


#22
1 2 3 4
R G B O

If after the first experiment there is one orange (let's make that be in the 4th flask). So, to avoid a second orange let's not mix flasks 2 + 3, so we can mix flasks 1 + 2 or 1 + 3. So, in the second experiment we could mix flasks 4 + 2 or 4 + 3. The latter option is answer choice (E).

I am still confused about the game.

In the explanation above,
"(A) To see whether answer choice (A) works we'll keep a blue and a green and see what flasks they come from. They come from 2 and 3 respectively."
How do we know that they come from 2 and 3? Doesn't 2 + 3 = Orange?

For B,
(B) blue and orange come from 2 + 4, so does 1 + 3 make a second orange? No!
How do we know that "blue and orange come from 2 + 4"? Doesn't 2 + 4 = Green?
Why do we ask "does 1 + 3 make a second orange?"

I must still miss some inferences. Please elaborate in more detail. Thank you. I appreciate it.