Triangle A has sides of length 10, 13, and 13. Triangle B has sides of length 13, 13, and 24. What is the ratio of the area of triangle A to triangle B? (A) 1 : 1 (B) 24 : 13 (C) 2 : 1 (D) 12 : 5 (E) 3 : 1...

Read More No. of comments 0## Using Khan Academy to Prep for the GMAT or GRE – Redux

Posted on Categories - GMAT Quant, GMAT Verbal, GRE Quant, GRE VerbalI posted about this a while ago and included a list of suggested exercises and videos in a pdf. Since then I’ve revised and updated the list and you can find it here: GMAT Prep with Khan Academy It’s bigger and better and includes a lot of important stuff I missed the first time. However, one of...

Read More No. of comments 0## The GMAT Exam Format is Changing!!!

Posted on Categories - GMAT Quant, GMAT VerbalIn 2016 several of my students were offered the opportunity to take the GMAT in any order they wanted – i.e. they could opt to take the Quantitative, Verbal, Integrated Reasoning, and Analytical Writing Assessment sections first and arrange the other three sections as they saw fit. Sounded awesome at the time, but I never...

Read More No. of comments 0## Unofficial Guide 2017 – PS 51

Posted on Categories - GMAT QuantA video explanation of problem 51 from the 2017 Official Guide to GMAT Reviewe Check it out...

Read More No. of comments 0## Mixtures Quiz

Posted on Categories - GMAT QuantThis is my first word problems quiz. It’s short because mixtures and weighted averages aren’t exactly high payoff. It’s only PS questions at moment. I may throw in some DS in the near future. I’ll keep you posted on new quizzes and updates to all existing quizzes. Anyway, check it out on the Quizzes and...

Read More No. of comments 0## Using Kahn Academy for GMAT or GRE Prep

Posted on Categories - GMAT Quant, GRE QuantIf you don’t know what Khan Academy is, watch this. When it comes to GMAT prep, using Khan Academy can be a very effective tool for refreshing basic skills, but there’s a catch – KA content is aligned to the common core state standards for math. The GMAT is NOT aligned to the common core....

Read More No. of comments 0## The 2017 Official Guides

Posted on Categories - GMAT Quant, GMAT VerbalWorking with my students I have noticed a couple of errors in the latest version of the Official Guide. When I investigated I found that there are a lot of errors – 60 by my count as well as 6 grammatical errors in their guide to the SC questions!!!...

Read More No. of comments 0## Challenge Problem 2 2016

Posted on Categories - GMAT Quant(Note: Not drawn to scale) In triangle ABC, CE is perpendicular to AB and BD is perpendicular to to AC. If EC = 5 and BD = 3, what is the ratio of AC to AB? (A) 3 : 5 (B) 3 : 4 (C) 4 :...

Read More No. of comments 0## Unofficial Guide 2016 PS 101

Posted on Categories - GMAT QuantI’m going to do a number of these posts. You can think of them as commentary on the 2016 Official Guide for GMAT Review. I’m going to use the abbreviations PS, DS, RC, CR, and SC for Problems Solving, Data Sufficiency, Reading Comprehension, Critical Reasoning, and Sentence Correction. Sometimes I’ll present alternative solutions, more detailed...

Read More No. of comments 0## Challenge Problem 1 2016

Posted on Categories - GMAT QuantIf , which of the following is a possible value of ? (A) (B) (C) (D) (E) ...

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