Prime Factorization Articles
Decoding Number Properties on the GMAT - Part 3
Welcome to the 3 rd and final installment of our mini-series on Number Properties. We’ve been doing a deep dive into Divisibility and Prime issues (see Part 1 and Part [...]
Decoding Number Properties on the GMAT - Part 2
Welcome to the 2 nd installment of our dive into Number Properties. If you haven’t yet tried the first problem, start with the first article in the series . Let’s dive [...]
Decoding Divisibility and Prime on the GMAT - Part 1
Most of my students are driven crazy by Number Properties. On the face of it, the topic seems straightforward: I know what positive and negative, odd and even are. Divisibility [...]
GMAT Prep Challenge: Can You Do This Math Problem?
No introduction to this one—see what you can figure out and then we’ll talk about it! This is a GMATPrep® problem from the free exams. * “If n and y are [...]
What is this Quant Question Hiding?
A certain class of questions tends to have more going on than might be apparent on the surface. (I’m being intentionally vague as to the “certain class” – I’ll tell [...]
Pesky Prime Theory
Data Sufficiency problems often have elegant shortcuts if we really understand the theory behind whatever the problem tests – and, sometimes, DS sets up some very tricky traps if we [...]
Decoding the Prime Disguise
How can the GMAT disguise a prime number (or any other) problem? I asked this question a couple of years ago at the start of a very important article entitled [...]
Number Properties in GMATPrep
What are number properties? This concept covers things that we often call “basic” – topics that we learned in middle school (or earlier): divisibility, factors and multiples, odds and evens, [...]
Manhattan GMAT Challenge Problem of the Week - 6 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 - 19 July 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! [...]
Breaking Down A GMATPrep Divisibility Problem
We’ve got another GMATPrep® word problem on tap for today, but this one’s in the area of divisibility (number properties). These kinds of problems often include a lot of math [...]
Manhattan GMAT Challenge Problem of the Week - 28 June 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 [...]
Manhattan GMAT Challenge Problem of the Week – 01 Mar 2011
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 [...]
Manhattan GMAT Challenge Problem of the Week – 8 Feb 2011
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 [...]
Manhattan GMAT Challenge Problem of the Week – 1 Feb 2011
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 [...]
Grockit GMAT and MBA Admissions Course: Lesson 4, Part 3 – 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 – 9 Nov 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 [...]
Manhattan GMAT Challenge Problem of the Week – 13 Oct 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. If [...]
Manhattan GMAT Challenge Problem of the Week – 5 Oct 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. A [...]
Top 10 Tips for the Data Sufficiency Section
If you're just starting your GMAT prep (or even if you've been at it for a little while), the Data Sufficiency section can be tricky. After all, who ever heard [...]
Disguising – and Decoding – Quant Problems
How can the GMAT disguise a prime number (or any other) problem? That’s exactly what we’re going to discuss today! We’re going to use the concept of prime to describe [...]
Thursdays With Ron: Prime Boxes
This is the third installment of our Thursdays with Ron posts. Every other Thursday, our instructor Ron Purewal (known on the Beat the GMAT forums as lunarpower ) hosts a [...]
Manhattan GMAT Challenge Problem of the Week – 8 June 2010
This is our latest Challenge Problem! As always, the problem and solution below were written by one of our fantastic instructors . Each challenge problem represents a 700+ level question. [...]
Knewton Brutal GMAT Challenge - Week 10
There is a Knewton shirt out in the veld, floating around all free. You can claim it if you answer this question correctly, and show your work. The first term [...]