Here are a set of practice GMAT questions about the Cartesian plane. 1) What is the equation of the line that goes through (–2, 3) and (5, –4)? y = –x + 1 y = x + 5 y = –3x/7 + 15/7 y = –4x/3 + 1/3 y = 9x/5...

First, a practice GMAT Sentence Correction question: 1) Extracting pure aluminum from bauxite and other ores using the Hall-Héroult process, with a vast amount of electrical energy separating the element from aluminum oxide, making aluminum an energy-dense resource with a huge carbon footprint. using the Hall-Héroult process, with a...

One reason we graph data in a scatterplot is because we are looking for patterns.  The simplest of all possible patterns to find on a scatterplot is a straight line pattern.   Correlation When the points on a scatterplot lie more or less in a straight-ish line, that is called correlation. ...

On the GMAT Sentence Correction, the –ing form of a verb will sometimes act as part of the main verb: in this case, it is part of one of the Progressive Tenses of a verb.  Sometimes the –ing form of a verb will modify a noun: in...

Overview If you are starting your studying from Square One, and someone gives you this book for free, then it could serve as a rudimentary start.  Don’t spend any money on this book, and for heaven’s sake, do not make this book the sole basis for...

First of all, for warm-up, a practice Data Sufficiency question. The symbol What does this symbol mean in math? Technically, this symbol, typographically a dash, has three different meanings in mathematics, viz.: a) a subtraction sign b) a negative sign c) an opposite sign   The subtraction sign When the dash appears between two terms  —...

Learn what to read now to best prepare yourself for GMAT Reading Comprehension Not surprisingly, one of the very best ways to prepare for GMAT Reading Comprehension is simply to read, preferably from a high-quality reading list of GMAT-style material.  If you have only a few weeks between...

How do we know what the possible values for a variable on the GMAT are?  First of all, consider this DS problem 1) Is P > Q? Statement #1: P = 5*Q Statement #2: P = Q + R For folks who are not as comfortable with math, or are...

Learn the most common solutions to the Pythagorean Theorem There aren’t many numbers you need to memorize for success on the GMAT Quantitative section, but knowing a few key Pythagorean triplets will save you a ton of time.  First, try these GMAT practice question: remember: no calculator! 1)...

How do you find the distance between two points in the x-y plane?  First, try these practice questions. 1) What is the distance from (–7, 2) to (5, –3)? 10 11 12 13 14 2) Consider the three points in the x-y plane: P = (8, 4), Q = (6, 7), and R...