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Let me just chime in and say that this looks very not-test-like to me. I've never seen a CR problem from an official source using this format. However, (D) does not contradict anything in the passage. If Alicia was driving *more* recklessly than Peter, then it *supports* the author's claim that the ...

by Eli@Prep4GMAT

Wed May 27, 2015 12:31 pm
Forum: Critical Reasoning
Topic: Doubtful OA: question from 300CR's
Replies: 3
Views: 1616

b. People whose diet is unusually high in protein often have other characteristics in common, some of which are likely to cause insomnia. The argument already states that there can be other causes in addition to high protein diet. So may be these other characteristics are in addition to high protei...

by Eli@Prep4GMAT

Wed May 27, 2015 12:25 pm
Forum: Critical Reasoning
Topic: Proteins and Insomnia
Replies: 5
Views: 2638

A is correct here. Remember to pay attention to every bit of information you're given in the question stem; even little phrases like "two different numbers" can completely change the solution to a DS problem.

by Eli@Prep4GMAT

Tue May 26, 2015 1:19 pm
Forum: Data Sufficiency
Topic: Trivial number line
Replies: 6
Views: 4107

GMATGuruNY has the right solution, but on test-day you don't need the right solution to a problem like this--you can do it even faster by recognizing the n variables, n equations principle. In order to solve for a system of equations with n different variables, you need n unique equations. As the Gu...

by Eli@Prep4GMAT

Tue May 26, 2015 1:16 pm
Forum: Problem Solving
Topic: Data sufficiency
Replies: 3
Views: 2386

Hotco: "So you spend $5000 on 1000 units of oil in the last two years. Instead, why don't you install our burners; you'll need only 800 units of oil. Since that will cost you only $4000, you can give us the savings as the only payment we need--and if you end up spending more, we'll refund the d...