Try the GMAT Problem Solving sample questions below. Try and pick the answer that best fits the question, then click on the Get Answer link and download a comprehensive explanation.

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Question 1
The price of copper rose by 25 percent and then fell by 20 percent. The price after these changes was
A. 20 percent greater than the original price
B. 5 percent greater than the original price
C. the same as the original price
D. 5 percent less than the original price
E. 15 percent less than the original price
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Question 2
To meet a government requirement, a bottler must test 5 percent of its spring water and 10 percent of its sparkling water for purity. If a customer ordered 120 cases of spring water and 80 cases of sparkling water, what percent of all the cases must the bottler test before he can send it out?
A. 6.5%
B. 7.0%
C. 7.5%
D. 8.0%
E. 8.5%
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Question 3
How many multiples of 3 are there among the integers 15 through 105 inclusive?
A. 30
B. 31
C. 32
D. 33
E. 34
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Question 4
How many different ways can 2 students be seated in a row of 4 desks, so that there is always at least one empty desk between the students?
A. 2
B. 3
C. 4
D. 6
E. 12
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Question 5
A number of bricks were purchased to build a fireplace, at a cost of 40 cents each, but only ¾ of them were needed. If the unused 190 bricks were returned and their cost refunded, what was the cost of the bricks used to make the fireplace?

