December 25th, 2009 | 
Author: If 10 persons meet at a reunion and each person shakes hands exactly once with each of the others, what is the total number of handshakes?
(A) 10•9•8•7•6•5•4•3•2•1
(B) 10•10
(C) 10•9
(D) 45
(E) 36
Highlight to see answer: D
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Tags: gmat, gmat review, practice problems, Problem Solving | 
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How many liters of pure alcohol must be added to a 100-liter solution that is 20 percent alcohol in order to produce a solution that is 25 percent alcohol?
(A) 7/2
(B) 5
(C) 20/3
(D) 8
(E) 39/4
Highlight to see answer: C
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Tags: gmat, gmat review, practice problems, Problem Solving |
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When the integer n is divided by 6, the remainder is 3, Which of the following is NOT a multiple of 6?
(A) n – 3
(B) n + 3
(C) 2n
(D) 3n
(E) 4n
Highlight to see answer: <span style=”color: #ffffff;”>D</span>
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Tags: gmat, gmat review, practice problems, Problem Solving |
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If an organization were to sell n tickets for a theater production, the total revenue from ticket sales would be 20 percent greater than the total costs of the production. If the organization actually sold all but 5 percent of the n tickets, the total revenue from ticket sales was what percent greater than the total costs of the production?
(A) 4%
(B) 10%
(C) 14%
(D) 15%
(E) 18%
Highlight to see answer: C
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Tags: gmat, gmat review, practice problems, Problem Solving |
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In ΔPQS above, if PQ =3 and PS = 4, then PR = ?
(A) 9/4
(B) 12/5
(C) 16/5
(D) 15/4
(E) 20/3
Highlight to see answer: B
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