Logic Games Answers - Ivy Global

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$SAT MATH CHECKLIST: Facts and Formulas - Ivy Global$

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Preptests 62 Answers and Explanations (By Ivy Global)e) This is the correct answer.5. Type of Question: Local—Must Be TrueWe already know that W can’t be 6 (L must come after it, as per rule 1), P can’t be 6 (G and Smust come after it, as per rule 2), and T can’t be 6 (as per rule 4). Now, we’re told that both Gand S can’t fall on 6, so that leaves only L.b) This is the correct answer.6. Type of Question: Global—SubstitutionFor this question we’ll have to find an answer choice that stops T from going in 6 and doesn’tcreate any other restrictions.a) This is the correct answer. We know G and S have to be in 4, 5, or 6, so T will have tocome before at least one of them.b) We’ve seen many cases where T is not immediately before G or S—when T falls in 1.c) We saw L come before T in question 3 c).d) We saw G come before T in question 3 c).e) L could also fall on 6.Questions 7 – 13This is a particularly long and difficult game, but it is manageable if you make a key inference.Rule #3 and #4 combine into an important inference. Y is never with G or O, and without O, we musthave P. This means Y will always occur with P.With this inference, we know we have two windows with R, one window with GP, and onewindow with PY.7. Type of Question: Global—ListThis question should be approached with a rule sweep.a) Eliminated by rule # 4: Each window must have O or P.b) This is the correct answer.c) Eliminated by rule #1: Exactly one window must contain G and P.d) Eliminated by rule #3: Y cannot be paired with O.e) Eliminated by rule #2: Exactly two windows have R.8. Type of Question: Global—Cannot Be TrueWe should go through this with reference to the rules, past work, and hypotheticals if necessary,so it should be left until the end.a) We saw this in question 13.b) We saw this in question 10.c) This is the correct answer. Each window must have one of either P or O in it.d) We saw this in question 11.e) We saw this in question 9.9. Type of Question: Local—Could Be TrueIvy Global
Preptests 62 Answers and Explanations (By Ivy Global)Since Y can’t be present with P, and we already have two spots filled with R, we can set up ourbase diagram for this question like so:R R YO/P O/P PWe know that G must also be present once with P, and so that can go in one of the first twowindows.a) We can never have R and Y together without P.b) This is the correct answer, and the set-up could look like this:R R YO P PGc) This doesn’t work in our diagram.d) We always need P or O in each window.e) This doesn’t work in our diagram.10. Type of Question: Local—Could Be TrueWe’re told the set up of one window: P, R, O. We know that we still need a window with R, awindow with G and P, and a window with Y and P. We also know that the G/P and Y/P windowscan’t be combined, since G and Y can’t be together. So, we get a set-up that looks like this:R R PP P Y/GO Y/Ga) This isn’t possible.b) This is the correct window. The set-up could look like this:R R PP P GO Y Oc) This isn’t possible.d) This isn’t possible.e) This isn’t possible.11. Type of Question: Local—Could Be True?? a12. Type of Question: Local—Could Be TrueWe know that R can’t be used in every window, since rule 2 tells us only two windows contain R.Y can’t be in all three windows, since it can’t be with G or O.G and O also can’t be used in all three windows, because then we wouldn’t be able to place Gand O.We’re left with P.c) This is the correct answer.13. Type of Question: Local—Must Be TrueWe now know one colour for each window: R, R, and O. Y can’t be with O, so we know that onewindow will have to be R, P, Y.Ivy Global
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Logic Games Answers - Ivy Global

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