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PREP07 Test 2
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After determining the levels of calcium carbonate and the types of fossilized algae present in core samples taken from the bottom of Lake Titicaca in the Andes, a group of scientists was able to reconstruct the history of precipitation in tropical South America over the past 25,000 years.
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PREP07 Test 2
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If n is the product of the least and the greatest of 6 consecutive integers, what is the value of n ? (1) The greatest of the 6 consecutive integers is 20. (2) The average (arithmetic mean) of the 6 consecutive integers is 17.5.
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PREP07 Test 2
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The diameter of circle S is equal in length to a side of a certain square. The diameter of circle T is equal in length to a diagonal of the same square. The area of circle T is how many times the area of circle S ?
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PREP07 Test 2
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Although the turtle has been toothless for more than 150 million years, in some contemporary turtle species the moderately sharp and jagged edges of their horny jaws function for teeth.
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PREP07 Test 2
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Pat, Kate, and Mark charged a total of 162 hours to a certain project. If Pat charged twice as much time to the project as Kate and 1/3 as much time as Mark, how many more hours did Mark charge to the project than Kate?
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PREP07 Test 2
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If n and s are each 2-digit positive integers, is n greater than s ? (1) The units digit of n is greater than the units digit of s. (2) The tens digit of n is greater than the tens digit of s.
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PREP07 Test 2
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Changes in the composition of the light of a supernova--an exploding star--reveals not only the chemical elements in the explosion but also the speed of expanding the outer layers of stellar gas.
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PREP07 Test 2
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If n is a positive integer and r is the remainder when (n – 1)(n + 1) is divided by 24, what is the value of r?(1) 2 is not a factor of n.(2) 3 is not a factor of n.
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PREP07 Test 2
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The features of the floor of the Kasei Valles on Mars look just like those at the base of Antarctic ice streams, so it suggests that possibly it was flowing ice that carved the giant Martian channels previously attributed to cataclysmic floods.
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PREP07 Test 2
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If n is a positive integer, which of the following must be an even integer?
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PREP07 Test 2
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When positive integer n is divided by 3, the remainder is 2; and when positive integer t is divided by 5, the remainder is 3. What is the remainder when the product nt is divided by 15 ?(1) n - 2 is divisible by 5. (2) t is divisible by 3.
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PREP07 Test 2
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Of the 100 passengers who entered a railroad station, 10 passengers had 4 pieces of luggage each, 20 had 5 pieces of luggage each, 50 had 2 pieces of luggage each, and the rest had no luggage. What was the average (arithmetic mean) number of pieces of luggage per passenger?
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PREP07 Test 2 GWD
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Vivien Thomas, who had no formal medical training, in struggling against overwhelming odds, he became a cardiac surgeon and eventually to receive an honorary doctorate from Johns Hopkins University.
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PREP07 Test 2
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A rectangular region has a fence along three sides and a wall along the fourth side. The fenced side opposite the wall is twice the length of each of the other two fenced sides. If the area of the rectangular region is 128 square feet, what is the total length of the fence, in feet?
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PREP07 Test 2
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A certain motel has a total of 540 units, each of which has a 1-person, 2-person, or 4-person capacity. How many people stayed in the motel's 4-person units yesterday?(1) At this motel, 1/3 of the units are 4-person units.(2) Yesterday, 80 percent of the 4-person units in the motel were filled to capacity, and the rest of the 4-person units were empty.
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PREP07 Test 2
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Strawberries, unlike picking bananas that are green and can be ripened artificially, must be picked when they are fully ripe, and they remain at peak flavor for only four or five days after that.
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PREP07 Test 2
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If @ denotes one of two arithmetic operations, addition or multiplication, and if k is an integer, what is the value of 3 @ k ? (1) 2 @ k = 3(2) 1 @ 0 = k
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PREP07 Test 2
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Of the following, which is greatest?
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PREP07 Test 2
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Ranked among great mathematical scientists such as Archimedes, Kepler, and Newton, Abu Ali al-Hasan ibn al-Haytham, who was born in Iraq in 965 C.E., had experimented extensively with light and vision, laying the foundation for modern optics and also the notion of science being based on experiment as well as on philosophical arguments.
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PREP07 Test 2
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9.4 9.9 9.9 9.9 10.0 10.2 10.2 10.5 The mean and the standard deviation of the 8 numbers shown are 10.0 and 0.3, respectively. What percent of the 8 numbers are within 1 standard deviation of the mean?
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