GMAT Question of the Day – Data Sufficiency – Number Properties If a, b, and c are not equal to zero, is \( abc > 0 \)? (1) \( ab + ac > 1 \) (2) \( ac + cb > 1 \) Here’s a problem solving question also dealing with testing signs: How many
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GMAT Question of the Day – Problem Solving – Exponents If m and z are integers and if \( {{21}^{2m}}{{9}^{4m+2}}={{3}^{z}}{{7}^{4}} \), what is the value of m + z? A. 8 B. 14 C. 20 D. 24 E. 26
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a Failed GMAT Preparation and a GMAT Tutor Resigns During my first stint as his GMAT tutor, Morris was not the best GMAT student. He finished about half of the homework that I assigned. He lacked focus in our sessions. But, he was improving. A little. Sometimes he would get a mountain of work done
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GMAT Question of the Day – PS Work/Rate – May 2nd, 2014 The express train would have taken 30% longer to get from Station K to Station M if it had been traveling 18 miles per hour slower. What was the express train’s actual average speed, in miles per hour, from Station K to Station
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GMAT Question of the Day – DS Puzzle – May 1st, 2014 If x and y are integers, what is the value of x? (1) \( (x-y)(x+y) = 15 \) (2) \( \frac{x}{y} > 0 \) (1) Always convert difference of squares – \( x^2-y^2 = 15 \). Now you know that the difference of
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