Problem Solving

GMAT Question of the Day (Apr 2): Probability and Critical Reasoning

By - Apr 2, 02:00 AM   Comments [0]

Math (PS) There are 6 cards numbered from 1 to 6. They are placed into a box, and then one is drawn and put back and then another card is drawn and put back. What is the probability that one of the cards was 5 if...

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GMAT Question of the Day (Mar 30): Work Problem and Critical Reasoning

By - Mar 30, 02:00 AM   Comments [0]

Math (PS) Robert can eat a 20 kg. bag of potatoes in 10 days. He and his wife Jane can eat the same bag in 7 days. How many days does it take Jane to eat a 20 kg. bag of potatoes by herself? (A) (B) (C)...

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Percent Change Problems on the GMAT

By - Mar 28, 09:00 AM   Comments [0]

This is, among other things, a case study of one of the harder Data Sufficiency problems in the OG.   Percents as Multipliers You can find several good tips on percent problems at this post.  The most relevant here is the idea of a percent as multiplier.  To change...

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GMAT Question of the Day (Mar 28): Rate Problem and Sentence Correction

By - Mar 28, 02:00 AM   Comments [0]

Math (PS) Two trains continuously travel between Washington DC and Baltimore, which is 120 miles away. They start simultaneously, train A at Washington and train B at Baltimore, and run at 30 and 90 mph respectively. The station turnaround times are negligible. What is the distance...

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GMAT Question of the Day (Mar 27): Overlapping Sets and Critical Reasoning

By - Mar 27, 02:00 AM   Comments [0]

Math (PS) Foodmart customers regularly buy at least one of the following products: milk, chicken, or apples. 60% of shoppers buy milk, 50% buy chicken, and 35% buy apples. If 10% of the customers buy all 3 products, what percentage of Foodmart customers purchase exactly 2...

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GMAT Question of the Day (Mar 22): Word Problem and Sentence Correction

By - Mar 22, 02:00 AM   Comments [0]

Math (PS) A 4 cm cube is cut into 1 cm cubes. What is the percentage increase in the surface area after such cutting? (A) 4% (B) 166% (C) 266% (D) 300% (E) 400% OA and Explanation Question Discussion & Explanation Correct Answer - D - (click and drag your mouse to see the...

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GMAT Question of the Day (Mar 21): Arithmetic and Sentence Correction

By - Mar 21, 02:00 AM   Comments [0]

Math (PS) Which expression has the greatest value? (A) (B) (C) (D) (E) Question Discussion & Explanation Correct Answer - C - (click and drag your mouse to see the answer) GMAT Daily Deals Free GMAT Club tests (over 1,100 questions & $250 value) + $200 promo code when you...

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Free Explanation Videos for GMAT Official Guide (12th Edition) Math Practice Problems

By - Mar 20, 09:00 AM   Comments [0]

Many of our students requested that we record video explanations for the math questions (“Sample Questions”) from the GMAT Official Guide, both Data Sufficiency and Problem Solving, and we were happy to help! Here’s the link to the videos, be sure to bookmark it and refer...

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GMAT Question of the Day (Mar 16): Algebra and Critical Reasoning

By - Mar 16, 02:00 AM   Comments [0]

Math (PS) If is a positive integer, is defined as the number of positive integers which are less than and do not have common factor with other than 1. If is prime then (A) (B) (C) (D) (E) 2 Question Discussion &...

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GMAT Question of the Day (Mar 8): Probability and Sentence Correction

By - Mar 8, 02:00 AM   Comments [0]

Math (PS) A basket contains 3 blue marbles, 3 red marbles, and 3 yellow marbles. If 3 marbles are extracted from the basket at random, what is the probability that a marble of each color is among the extracted? (A) (B) (C) (D) (E) Question Discussion &...

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