Equations Articles
Know the GMAT Code: Working Backwards
Do you know how to Work Backwards on Problem Solving (PS) problems? More important, do you know when to work backwards—and when not to? To get a really high score [...]
The GMAT Official Guide 2018 Edition - Part 2
The new Official Guide (OG) books have landed and I’ve got the scoop for you! (If you’d like, you can start with the first installment of this article series.) Today’s [...]
Know the GMAT Code: Story Problems
How are the GMAT test writers going to hide information in plain sight and get you to fall into traps? Try out this problem in our Know the Code series and [...]
Know the GMAT Code: Quadratics
You’ve studied the math, but how well do you know how to decipher unusual math clues that the test writers hide in GMAT problems? To get a really high score [...]
Final Exam: Are You a Great GMAT Guesser? - Part 4
Okay, you’ve had several weeks to practice your GMAT guessing . Let’s put your newfound skills to the test! (If you’re reading all these articles at once, stop here. Give yourself [...]
GMAT Story Problems: Draw It Out!
Whenever I see a story problem, I immediately make myself think, “How would I solve this in the real world?” I don’t want to get sucked into doing a bunch [...]
When Your High School Algebra is Wrong: How the GMAT Breaks Systems of Equations Rules
If you have two equations, you can solve for two variables. This rule is a cornerstone of algebra. It’s how we solve for values when we’re given a relationship between [...]
Memorize This and Pick Up 2 or 3 Quant Questions on the Test!
Memorize what? I’m not going to tell you yet. Try this problem from the GMATPrep® free practice tests first and see whether you can spot the most efficient solution. * “If [...]
The 4 Math Strategies Everyone Must Master: Testing Cases Redux
A while back, we talked about the 4 math strategies that everyone needs to master . Today, I’ve got some additional practice for you with regard to one of those strategies: [...]
Avoiding the C-Trap in Data Sufficiency
Have you heard of the C-Trap? I’m not going to tell you what it is yet. Try this problem from GMATPrep® first and see whether you can avoid it: * “In [...]
Data Sufficiency in GMAT Prep: Maria's Books
Last week, we discussed the overall process for Data Sufficiency . This week, we’re going to test out the process using a GMATPrep question – and take a look at [...]
How Do I Translate This GMATPrep problem?
I’ve been speaking with a lot of students recently who are really struggling with translation problems – even when they can figure out how to translate, they end up taking [...]
Manhattan GMAT Challenge Problem of the Week - 5 Oct 2011
Here is a new Challenge Problem! If you want to win prizes, try entering our Challenge Problem Showdown . The more people that enter our challenge, the better the prizes! [...]
Manhattan GMAT Challenge Problem of the Week - 14 Sept 2011
Here is a new Challenge Problem! If you want to win prizes, try entering our Challenge Problem Showdown . The more people that enter our challenge, the better the prizes! [...]
Manhattan GMAT Challenge Problem of the Week - 30 Aug 2011
Here is a new Challenge Problem! If you want to win prizes, try entering our Challenge Problem Showdown . The more people that enter our challenge, the better the prizes! [...]
Autotune the GMAT
You've heard of Autotune the News. But have you tried autotuning GMAT exponent rules? [youtube]http://www.youtube.com/watch?v=3wavlUC223E[/youtube] Dave Ingber (Knewton's lead GMAT teacher) and RoboMath (our lead GMAT robot?) show you how a little [...]
GMAT On Demand: Three Classic DS Problems Involving Systems of Equations
// In this video, Jess and Rich cover some of the key strategies for solving Data Sufficiency questions involving systems of equations. There are three sample problems to try on [...]
Grockit GMAT and MBA Admissions Course: Lesson 5, Part 1 – Verbal Sentence Correction
We’re making sections of Grockit’s GMAT Course available to stream online for free! The course is taught by Grockit Founder Farb Nivi and covers the entire GMAT curriculum in 16 [...]
Grockit GMAT and MBA Admissions Course: Lesson 4, Part 5 – Quant Number Properties and Operations
We’re making sections of Grockit’s GMAT Course available to stream online for free! The course is taught by Grockit Founder Farb Nivi and covers the entire GMAT curriculum in 16 [...]
Grockit GMAT and MBA Admissions Course: Lesson 4, Part 2 – Quant Number Properties and Operations
We’re making sections of Grockit’s GMAT Course available to stream online for free! The course is taught by Grockit Founder Farb Nivi and covers the entire GMAT curriculum in 16 [...]
Manhattan GMAT Challenge Problem of the Week – 6 Dec 2010
Here is a new Challenge Problem! If you want to win prizes, try entering our Challenge Problem Showdown . The more people enter our challenge, the better the prizes. Question [...]
Breaking Down a GMATPrep Coordinate Plane Problem
This week, we’re going to tackle a harder GMATPrep® problem solving question from the topic of Coordinate Planes (a subset of Geometry). Let’s start with the problem. Set your timer for [...]
GMAT Case Study: Hidden Information in Word Problems
Here's another post in our Knewton GMAT Case Study series, where we dig into the key concepts behind GMAT practice questions. This week: word problems. After you practice long enough [...]
Breaking Down a GMATPrep Divisibility Problem
This week, we’re going to tackle a challenging GMATPrep® problem solving question from the topic of Divisibility (a subset of Number Properties). Let’s start with the problem. Set your timer for [...]
How To Turn Algebra Into Arithmetic
I have never met anyone who is better at algebra than he or she is at arithmetic. As good as a person may be with algebra, that person’s going to [...]