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PREP07 Test 2
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The maximum temperatures, in degrees Fahrenheit, recorded in a city on 5 consecutive days were x + 3, 95, 87, x + 7, and x. If the average (arithmetic mean) of these temperatures was 90 degrees Fahrenheit, what is the value of x ?
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PREP07 Test 2
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Radiocarbon dating of fossils taken from caves on islands along southeastern Alaska's coast suggest that at least a portion of the area was remaining ice-free during the last ice age.
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OG12 PREP07 Test 2
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If n is a positive integer, is $$n^3 - n$$ divisible by 4 ?(1)$$n = 2k + 1$$, where k is an integer.(2)$$n^2 + n$$ is divisible by 6.
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PREP07 Test 2
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There are 15 slate rocks, 20 pumice rocks, and 10 granite rocks randomly distributed in a certain field. If 2 rocks are to be chosen at random and without replacement, what is the probability that both rocks will be slate rocks?
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PREP07 Test 2
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If x $$\neq -y$$, is (x-y)/(x+y)>1?(1) x > 0(2) y < 0
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PREP07 Test 2
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Thirteen states from all regions of the country announced a plan to impose new controls on pollution from truck and bus engines in that they will jointly adopt emission limits that would be far stricter than the federal rules.
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PREP07 Test 2
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A certain group of car dealerships agreed to donate x dollars to a Red Cross chapter for each car sold during a 30-day period. What was the total amount that was expected to be donated?(1)A total of 500 cars were expected to be sold.(2)Sixty more cars were sold than expected. so that the total amount actually donated $28,000.
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PREP07 Test 2
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The y-intercept of a line L is 4. If the slope of L is negative, which of the following could be the x-intercept of L ? I. -1 II. 0 III. 6
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PREP07 Test 1 PREP07 Test 2
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Some patients who do not respond to therapies for depression may simply have received inadequate treatment, having, for example, been prescribed a drug at a dosage too low to be effective or having been taken off a drug too soon.
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PREP07 Test 2
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Over a certain time period, did the number of shares of stock in Ruth's portfolio increase? (1) Over the time period, the ratio of the number of shares of stock to the total number of shares of stocks and bonds in Ruth's portfolio increased. (2) Over the time period, the total number of shares of stocks and bonds in Ruth's portfolio increased.
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PREP07 Test 2
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A hiker walking at a constant rate of 4 miles per hour is passed by a cyclist traveling in the same direction along the same path at a constant rate of 20 miles per hour. The cyclist stops to wait for the hiker 5 minutes after passing her, while the hiker continues to walk at her constant rate. How many minutes must the cyclist wait until the hiker catches up?
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PREP07 Test 2
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A recent poll indicates that many people in the United States hold a combination of conservative and liberal political views; i.e., they denounce big government, saying government is doing too much and has become too powerful, while at the same time supporting many specific government programs for health care, education, and the environment.
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PREP07 Test 2
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Is |x | = y - z ? (1) x + y = z (2) x < 0
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PREP07 Test 2
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A contest will consist of n questions, each of which is to be answered either "True" or "False." Anyone who answers all n questions correctly will be a winner. What is the least value of n for which the probability is less than 1/1000 that a person who randomly guesses the answer to each question will be a winner?
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PREP07 Test 1 PREP07 Test 2 OG18-文本逻辑 OG19-文本逻辑 OG20-文本逻辑
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The Anasazi settlements at Chaco Canyon were built on a spectacular scale, with more than 75 carefully engineered structures, of up to 600 rooms each, were connected by a complex regional system of roads.
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PREP07 Test 2
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If $$(x-b)^{\frac13}=c^6$$, then x =
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PREP07 Test 2
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If n is an integer, is $$-3x^n$$ positive?(1) x is negative.(2) n is odd.
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PREP07 Test 1 PREP07 Test 2
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First discovered more than 30 years ago, Lina's sunbird, a four-and-a-half-inch animal found in the Philippines and that resembles a hummingbird, has shimmering metallic colors on its head; a brilliant orange patch, bordered with red tufts, in the center of its breast; and a red eye.
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PREP07 Test 2
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If n is an integer between 2 and 100 and if n is also the square of an integer, what is the value of n ? (1) n is even. (2) The cube root of n is an integer.
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PREP07 Test 2
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If $$ab\neq0$$, then $$a^{-1} + b^{-1} =$$
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