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1211
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题目： Appleton's population is 400 greater than Berryville's population. If Berryville's population were reduced by 900 people, then Appleton's population would be 3 times as large as Berryville's population. What is Berryville's current population?
1212
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题目： 0.000125 =
1215
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题目： Machine A can make 350 widgets in 1 hour, and machine B can make 250 widgets in 1 hour. If both machines work together, how much time will it take them to make a total of 1000 widgets?
1216
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题目： Jack has 5 cats and 1 dog. If the dog's weight is 3 times the average (arithmetic mean) weight of the cats, then the dog's weight is what fraction of the total weight of all 6 animals?
1217
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题目： Joan has 100 candies to distribute among 10 children. If each child receives at least 1 candy and no two children receive the same number of candies, what is the maximum number of candies that a child can receive?
1218
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题目： $$\sqrt{12x32x54}$$
1219
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题目： A bag contains x blue chips and y red chips. If the probability of selecting a red chip at random is $$\frac{3}{7}$$, then $$\frac{x}{y} =$$
1220
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题目： $$49^{2}-35^{2}\over{14}$$=
2987
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题目： What is the value of y?Statement #1:$$3y-1= \sqrt{8y^2-4y+9}$$Statement #2: $$y^2 – 2y – 8 = 0 $$
2988
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题目： If x, y and k are integers, is xy divisible by 3?(1) $$y = 2^{16} - 1$$(2) The sum of the digits of x equals $$6^k$$
1177
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题目： If a sequence is defined by$$ an = (a_{n-1})^2 - 2(a_{n-2}) $$for $$n\ge1$$ ,and if $$a_1 = 2 and a_2 = 3, what is the fifth term (a_5) $$of the sequence?
1178
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题目： The numbers p and q are both positive. If p percent of 160 equals q percent of 40, then $$\frac{p}{q} =$$
1179
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题目： For all numbers x and y, the operation$$\Phi$$ is defined by x$$\Phi$$ y = (x+y)(x-y) + (y-x)(y+x) +xy. What is the value of $$\sqrt{12}\Phi\sqrt{3}$$?
1180
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题目： Working alone, pump A can empty a pool in 3 hours. Working alone, pump B can empty the same pool in 2 hours. Working together, how many minutes will it take pump A and pump B to empty the pool?
1181
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题目： In the diagram above, angle measures in degrees are marked as shown, and segment BC is parallel to line AD. What is the measure of angle E?
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2019.10.14
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