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PREP07 Test 2
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If $$S={{n(n+1)}\over{2}}$$ and n = 40, then S =
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PREP07 Test 2
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Lynn lent Robert $10,000 at 6 percent simple annual interest to be repaid at the end of 3 years. What was the total amount that Robert had to pay to Lynn?
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PREP07 Test 2
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 If the tick marks on the number line shown are equally spaced, what is the value of $$\frac{t}{s}$$ ?
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PREP07 Test 2
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Five pieces of wood have an average (arithmetic mean) length of 124 centimeters and a median length of 140 centimeters. What is the maximum possible length, in centimeters, of the shortest piece of wood?
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PREP07 Test 2
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In the xy-plane, line k has positive slope and x-intercept 4. If the area of the triangle formed by line k and the two axes is 12, what is the y-intercept of line k ?
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PREP07 Test 2
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Machines X and Y produce bottles at their respective constant rates. Machine X produces k bottles in 6 hours and machine Y produces k bottles in 2 hours. How many hours does it take machines X and Y, working simultaneously, to produce 12k bottles?
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PREP07 Test 1
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For how many integers n is $${2}^{n}={n}^{2}$$ ?
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PREP07 Test 1
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The number of stamps that Kaye and Alberto had were in the ratio 5 : 3, respectively.After Kaye gave Alberto 10 of her stamps, the ratio of the number Kaye had to the number Alberto had was 7 : 5. As a result of this gift, Kaye had how many more stamps than Alberto?
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PREP07 Test 1
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The perimeters of square region S and rectangular region R are equal. If the sides of R are in the ratio 2 : 3, what is the ratio of the area of region R to the area of region S ?
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PREP07 Test 1
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40, 45, 45, 50, 50, 60, 70, 75, 95, 100The scores on a certain history test are shown above. How many scores were greater than the median score but less than the mean score?
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PREP07 Test 1
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At a dinner party, 5 people are to be seated around a circular table. Two seating arrangements are considered different only when the positions of the people are different relative to each other. What is the total number of different possible seating arrangements for the group?
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PREP07 Test 1
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From a bag containing 12 identical blue balls, y identical yellow balls, and no other balls,one ball will be removed at random. If the probability is less than 2/5 that the removed ball will be blue, what is the least number of yellow balls that must be in the bag?
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PREP07 Test 1
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If r and s are integers and rs + r is odd, which of the following must be even?
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PREP07 Test 1
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If each term in the sum $${a}_{1}$$ + $${a}_{2}$$ + . . . + $${a}_{n}$$ is either 7 or 77 and the sum equals 350,which of the following could be equal to n ?
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PREP07 Test 1
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Which of the following is equal to $${x}^{18}$$ for all positive values of x ?
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PREP07 Test 1
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 In the addition table shown above, what is the value of m + n ?
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PREP07 Test 1
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A company has two types of machines, type R and type S. Operating at a constant rate,a machine of type R does a certain job in 36 hours and a machine of type S does the same job in 18 hours. If the company used the same number of each type of machine to do the job in 2 hours, how many machines of type R were used?
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PREP07 Test 1
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A circular jogging track forms the edge of a circular lake that has a diameter of 2 miles.Johanna walked once around the track at the average rate of 3 miles per hour. If t represents the number of hours it took Johanna to walk completely around the lake, which of the following is a correct statement?
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PREP07 Test 1
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I. 72, 73, 74, 75, 76II. 74, 74, 74, 74, 74III. 62, 74, 74, 74, 89The data sets I, II, and III above are ordered from greatest standard deviation to least standard deviation in which of the following?
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PREP07 Test 1
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At a constant rate of flow, it takes 20 minutes to fill a swimming pool if a large hose is used and 30 minutes if a small hose is used. At these constant rates, how many minutes will it take to fill the pool when both hoses are used simultaneously?
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