 # Flipping the Sign to Inequalities

- Dec 6, 09:23 AM   Comments 

Inequalities on the GMAT should be approached in the same way as regular equations. We can manipulate inequalities the same way that you can manipulate equations. As with equations on the GMAT, you first must simplify the equation in order to answer the...

# Data Sufficiency: Before you pick C…

- Nov 15, 09:00 AM   Comments 

To succeed on the GMAT, there is a general rule of Algebra that you should know: to solve for all variables in a system of equations, you need as many distinct linear equations as variables. So if you get 2 variables, you need two...

# Should I use Combination or Substitution?

- Nov 12, 09:00 AM   Comments 

You might remember back in the day in Algebra class that you learned how to work with systems of linear equations. These are problems when you have multiple equations and multiple variables, and you have to find a way to solve for each variable....

# First steps in prepping for GMAT Quant: Practice your Math Foundations

- Nov 2, 10:00 AM   Comments 

Basic math content knowledge, such as the formula for the area of a triangle or the equation for calculating an average, is often the wolf in sheep’s clothing on the GMAT – test takers who lack proficiency in the basics find it very challenging to...

# “Two Trains leave the station…” (Dealing with multiple rates questions)

- Oct 30, 10:00 AM   Comments 

Before students begin studying for the GMAT - before they even know anything about it beyond that it tests math and verbal - one question type worries students more than any other: a question about two trains traveling on parallel tracks. Every time I start to...

# Prime Factors

- Aug 26, 04:00 AM   Comments 

1,960 = 49 x 16 x y. What is the value of y? When most testtakers encounter problems such as the one above, they have a predictable, yet incorrect, reaction. Most people fret when faced with large numbers that would take more than two minutes to...

# Re-learning Ratios

- Aug 21, 04:00 AM   Comments 

The key to ratio problems on the GMAT is to remember all of the different ways a ratio can be written. Most students are used to seeing ratios denoted by a colon; the ratio of 3 to 5 would be written as 3:5. ...

# Math vs Verbal Study Time

- Aug 19, 04:00 AM   Comments 

If you have a limited amount of time to study, you are probably unsure of how to divide your time between the math and verbal sections. In determining how to split up your study time, there are a few factors that you should consider. Above...

# Knewton Video and Discount

- Jun 10, 07:50 AM   Comments 

Remember how to find the volume of a cylinder? It's okay most people don't; grade school was a long time ago! Knewton teacher Cole Entress helps you refresh your memory. Also, in honor of the World Cup(!), we're discounting our GMAT course by 10% through Monday night...

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# Classic GMAT Math Question from @Knewton

- May 14, 07:15 AM   Comments 

David Yourdon is a Content Developer at Knewton. He specializes in finding the underlying structure of GMAT math problems. A few weeks back, I wrote a post that discussed Dan Meyer's visionary talk about the future of math education. Halfway through the talk, Meyer mentions a...