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Mike

About Mike

Mike McGarry is a Content Developer for Magoosh with over 20 years of teaching experience and a BS in Physics and an MA in Religion, both from Harvard. He enjoys hitting foosballs into orbit, and despite having no obvious cranial deficiency, he insists on rooting for the NY Mets. Follow him on Google+!
Author Archive | Mike

GMAT Data Sufficiency: More Practice Questions

In the following problems, remember: no calculator!  Difficulty levels range from medium to hard. 2) Maggie is 15 years older than Bobby.  How old is Bobby? Statement #1: In 3 years, Maggie’s age will be 50% larger than Bobby’s age. Statement #2: Years ago, when Maggie was 25 years old, Bobby was 10 years old. […]

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GMAT Math: Weighted Averages

Problems range from easy to hard. 1) On a ferry, there are 50 cars and 10 trucks.  The cars have an average mass of 1200 kg and the trucks have an average mass of 3000 kg.  What is the average mass of all 60 vehicles on the ferry? 1200 kg 1500 kg 1800 kg 2100 […]

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The Word “Or” in GMAT Math

Consider the following scenario. Suppose you solve for all the numbers in a Venn Diagram, in a scenario in which 200 students are taking AP Chemistry, AP Literature, both, or neither. Here are the results you find. OK, from this solved Venn diagram, there’s a ton we know: total in AP Chemistry = 50 + […]

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Counting Practice Problems for the GMAT

1) A librarian has 4 identical copies of Hamlet, 3 identical copies of Macbeth, 2 identical copies of Romeo and Juliet, and one copy of Midsummer’s Night Dream. In how many distinct arrangements can these ten books be put in order on a shelf? (A) 720 (B) 1,512 (C) 2,520 (D) 6,400 (E) 12,600 2) […]

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GMAT Practice Problems: Variables in the Answer Choices

1) Jennifer can buy watches at a price of B dollars per watch, which she marks up by a certain percentage before selling. If she makes a total profit of T by selling N watches, then in terms of B and T and N, what is the percent of the markup from her buy price […]

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GMAT Practice Problems: Similar Geometric Figures

Here are four practice problems involving similar figures. 1) In the figure, KLMN is a square, and angle KJN = 45°.  Find the area of figure JKLMN. 2) In the diagram, HJLM is a square, and GH = 10.  Find the area of trapezoid GHJK. 3) In the diagram, BD = 5, CD = 10, […]

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GMAT Practice Problems on Coordinate Geometry

1) The line shown passes through the point (A, 30).  Which of the following is closest to the value of A? 58 59 60 61 62 2) Line A has a slope of and passes through the point (–2, 7).  What is the x-intercept of Line A? 3) Line J passes through the points (– […]

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How to Improve Your GMAT Verbal Score

Some people, stereotypically American students, are more comfortable with verbal information and find math challenging.  Other students, especially native speakers of other languages, find the math do-able, but find the GMAT Verbal section daunting.  In both math and verbal, there are the individual facts and individual strategies to know, and then there’s the good instincts, […]

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Challenging GMAT Problems with Exponents and Roots

Here are twelve challenging problems related to the topic of exponents & roots.  Remember, no calculator. (A) 17 (B) 19 (C) 21 (D) 23 (E) 27 4) Rank the following quantities in order, from smallest to biggest. (A) I, II, III (B) I, III, II (C) II, I, III (D) III, I, II (E) III, […]

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GMAT Practice Problems on Motion

Here are five practice questions.  Remember: no calculator. 1) A car, moving at a constant speed, covers 100 m in 5 seconds.  What is the car’s speed in km/hr? (1 km = 1000 m) 20 km/hr 54 km/hr 60 km/hr 72 km/hr 90 km/hr 2) Frank and Georgia started traveling from A to B at […]

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