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190113 还原机经选题: 文字题&几何
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According to the picture, Quadrilateral ABCD is inscribed in a circle and ∠A = 70°. ∠C=？
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190113 还原机经选题: 数论&代数
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(($$\frac{1}{3})^{2}+\frac{1}{3}*\frac{1}{4}$$)*(($$\frac{1}{3})^{2}-\frac{1}{3}*\frac{1}{4}$$)=?
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190113 还原机经选题: 数论&代数
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List multiples of 3 except 0 in a sequence: 369121518... 300. What is the 72nd digit in this sequence?
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190113 还原机经选题: 文字题&几何
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The range of sales of a commodity in the 12 months of 1999 was 240, and the range of sales in the 12 months of 2000 was 320. What is the minimum possible range of sales in the 24 months between 1999 and 2000?
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190113 还原机经选题: 数论&代数
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A and B are two-digit positive integers. The tens digit of A is 3. The unit digit of B is 5. A(B+1)=2016. 5A+2B=？
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190113 还原机经选题: 文字题&几何
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There are 21 employees in a company. According to the following conditions, can it be determined that the median annual salary of these people is less than $40,000?
1: The annual salaries of 12 people are less than $37,000.
2: The annual salaries of 9 people are greater than $41,000.
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190113 还原机经选题: 文字题&几何
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There are 23 people in the Planning Department, and A people in the Finance Department of a company. The total number of people of these two departments is B. How many people belong to both departments at the same time?
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190113
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$$x^{3}$$=-3,$$x^{2}$$=?
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190113
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If n is odd, f(n)=$$2^{n}$$. If n is even, f(n)=$$3^{n}$$. What is the value of f(n) when n=$$2^{10}$$?
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190113
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A group of people returned to the origin from the destination in batches. 30% returned in the first round, and half of the rest returned in the second round. What percentage of the total number of people returned in these two rounds?
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190113 还原机经选题: 文字题&几何
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The equation of a line is dx-by+c=0 (b≠0). What is the slope of the line?
(1)b+d = 10
(2)b/d = 4
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190113
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$$\frac{-(3+x^{2})}{x(4x-5)-(3-2x)^{2}}$$ is equivalent to which of the following options?
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190113
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There are two poles on the same ground, and the heights of two poles are 10 and 12. The distance between their bottom is 6. What is the distance between the apexes of two poles?
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190113 还原机经选题: 文字题&几何
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A paper mill has three machines a, b, and c. It takes 90 minutes for a, 45 minutes for b, and 30 minutes for c to produce 1800 sheets of paper alone. How many minutes does it take to produce 1800 sheets of paper if a, b and c work together?
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190113
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The total length of road is 1000 km. When someone drives, the average speed of the first 400 km is 200 km/h, and the average speed of the last 600 km is 150 km/h. What is the average driving speed of this whole trip?
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190113 还原机经选题: 文字题&几何
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The area of six faces of box A is x; the area of six faces of box B is 2x, 4x, 8x, 2x, 4x, 8x. The volume of A is 16. What's the volume of B?
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190113
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Given the distance between the starting point and the ending point on the map, what's the speed of a person driving this distance?
(1) The scale of the map is given.
(2) How long does it take for this person to drive from the starting point to the destination.
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190113 还原机经选题: 数论&代数
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Two students, Tom and Mary, solved the equation at the same time. Tom thought that the solutions of the equation were 1 and – 9, but he misread the corresponding number of c in the calculation. Mary thought that the solutions of the equation were 1 and 7, but Mary mistook the corresponding number of b in the calculation. What are correct solutions of this equation?
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190113
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According to the picture, BD=10. AC is perpendicular to CD. BC is perpendicular to AD. CD=?
(1)θ =60°
(2)AD=2AC
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190124
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What is the unit digit number of $$2^{k}$$ ?
1: k can be divided by 10.
2: k can be divided by 4.
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