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I factored it a bit different than the poster above me, but it's up to you what's easier for you. problem: 2^x - 2^(x-2) = 3 * 2^17 Working just the left side of the equation: 2^x - 2^(x-2) factor out 2^(x-2), which results in 2^(x-2) * (2^2 - 1) , which equals 2^(x-2)*3 going back to the full formu...

by jpjp

Sat Mar 13, 2010 2:43 pm
Forum: Problem Solving
Topic: Exponent Issue
Replies: 7
Views: 1668

It's A, because it prevents them from 'exiting swiftly' (first sentence) It's not C because it still achieves one half of their goal. Remember that gases often explode, meaning sometimes they do, sometimes they don't. So while having a smoke hood might not prevent all potential dangers, having one i...

by jpjp

Thu Mar 11, 2010 11:49 pm
Forum: Critical Reasoning
Topic: Toxic Fumes
Replies: 3
Views: 3442

I would go for D not B! See explanations: (A) Some comets are composed of material that reflects 60 times more light per unit of mass than the material of which Halley’s comet is composed.[Not supporting ] (B) Previous estimates of the mass of Halley’s comet which were base on its brightness we...

by jpjp

Thu Mar 11, 2010 11:34 pm
Forum: Critical Reasoning
Topic: Comets_CR
Replies: 15
Views: 3763

It goes both ways. I've seen plenty of people report that they did better on the real thing than the MGMAT CATs. There are so many factors to account for in score fluctuation (ie an individual's ability to perform with anxiety, ability to adapt to different styles of writing and still apply the same...

by jpjp

Thu Mar 11, 2010 5:56 pm
Forum: GMAT Strategy
Topic: Practice Exams vs. the real thing
Replies: 3
Views: 1173

The conclusion reads to me that they should publically fund shocking art because it is still art. This assumes that art as a whole is publically funded. B does not weaken the conclusion because whether or not they were funded has no bearing on if they should fund in the future. You can still argue t...

by jpjp

Thu Mar 11, 2010 8:13 am
Forum: Critical Reasoning
Topic: Powerscore Question - Art Historian
Replies: 19
Views: 6027

I think it's E as well. My reasoning is as follows: Conclusion: when such glasses are worn, it is because the wearer has a tendency to be depressed or hypochondriacal Before even looking at the choices, you should already see the flaw in logic that the author assumes x leads to y, and that y does no...

by jpjp

Wed Mar 10, 2010 11:34 pm
Forum: Critical Reasoning
Topic: Powerscore Question - Cause and Effect
Replies: 11
Views: 5044

I came up with D. I don't have some mind blowing technical explanation on how I came to my answer.. but my reasoning is as follows.... Conclusion: we should not hesitate to use public funds to support works of art that many people find shocking. A: irrelevant, does not address funding (out of scope)...

by jpjp

Wed Mar 10, 2010 11:01 pm
Forum: Critical Reasoning
Topic: Powerscore Question - Art Historian
Replies: 19
Views: 6027

You should keep trying. It seems your quant is on the right track, you may just not have had your A game that day. I bet with another crack at it, you'll be matching your practice Quant score. For verbal, it looks like your score dropped when you went took the GMATPrep CATs. I've been doing the MGMA...

by jpjp

Wed Mar 10, 2010 6:43 pm
Forum: GMAT Strategy
Topic: I would really appreciate your advice! got 580 on gmat :-(
Replies: 10
Views: 3736

Thanks a lot, good luck to you too So I took it again, this time with much more focus on pacing ... I managed to finish both sections .. but get this .....my quant - I got a total of 11 incorrect, but finished with only a 43! The scoring confuses me much more than any of the problems on the exam. I ...

by jpjp

Mon Mar 08, 2010 12:13 am
Forum: GMAT Strategy
Topic: Consecutive Incorrect Problems
Replies: 4
Views: 1187

Consecutive Incorrect Problems

I've read everywhere that getting consecutive problems incorrect is lethal to your score... but to what degree? Obviously nobody knows the exact algorithm but is there a decent estimate on how damaging it really is or why it's so lethal? The reason I ask is that I'm currently experiencing pacing iss...

by jpjp

Sat Mar 06, 2010 6:01 pm
Forum: GMAT Strategy
Topic: Consecutive Incorrect Problems
Replies: 4
Views: 1187