Posted on July 16, 2012 by Anthony Ritz
For this week’s post I decided to do a GMAT math question. The Official Guide for the GMAT provides explanations for all included questions, so I’m going to write one of my own and discuss it. This question could just as easily show up on a test like the GRE, the SAT, or the ACT.
The number N is increased by x% and then the result is decreased by x%. If the result is 64% of N, which of the following could be the value of x?
A. 8
B. 36
C. 60
D. 64
E. None of these
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Tags: ACT, Algebra, GMAT, GRE, Math, Percents, Question Analysis, SAT
Posted on July 9, 2012 by Anthony Ritz
Well, this weekend in my private tutoring ended up being all about correlation/causation issues, and I feel like sharing, so here you go:
The issue of correlation versus causation shows up on the LSAT, the GMAT, and the GRE, among other standardized tests. It’s a good idea to start by trying to understand correlation and causation generally. We’ll look at specific examples/applications and a full question analysis towards the end.
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Tags: Correlation versus Causation, GMAT, GRE, Logical Reasoning, LSAT
Posted on June 29, 2012 by Anthony Ritz
Today’s post is for all the GMAT (and GRE and SAT and ACT) students out there. Working with a student this week reminded me just how confused many test-takers are about what it really means for something to be a function and how often it is that these test-takers wind up frozen and unable to even begin to tackle function questions.
Ultimately, a lot of people just don’t understand what functions actually are.
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Tags: ACT, Algebra, Functions, GMAT, GRE, Math, SAT
Posted on June 23, 2012 by Anthony Ritz
As previously noted, one regular feature of this blog will be the “question of the week.” I intend to choose from among reader suggestions one question from the LSAT (or GMAT, or GRE, or SAT, or ACT) and to do a full analysis of the strategies needed to answer that question correctly. I will address why the right answer is right, why the wrong answers are wrong (where applicable), what mistakes students must be careful to avoid, and so forth.
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Tags: Inference, Logical Reasoning, LSAT, Question Analysis
Posted on June 23, 2012 by Anthony Ritz
The following materials will be the sources for problems discussed on this blog, and I strongly encourage the purchase of the listed materials for your test of interest. They are published by the official sources for their respective tests and are the most recent editions available.
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Tags: ACT, GMAT, GRE, LSAT, SAT
Posted on June 23, 2012 by Anthony Ritz
Hello and welcome to the newest test prep blog on the internet. My name is Anthony Ritz, and I am the founder and owner of Parallax Test Prep. As you may have seen elsewhere on the site, I’m an expert tutor with 10+ years of experience, an across-the-board 99th-percentile test taker, and an all-around nerd. I’ll be posting a new discussion here once a week or so, with my primary focus being test tips to help you, the student, score higher.
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