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181215
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What's the median of the sequence $$\frac{1}{π}$$，$$\frac{1}{π}$$-1，$$\frac{1}{π}$$+1，$$\frac{1}{（π-2）^{2}}$$，$$\frac{1}{（π+2）^{2}}$$？
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181215
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Belly leaved home at 8:30 in the morning and arrived at the company at 11:30. How far is it from home to the company?
1: He stopped twice on the way.
2: The average speed while driving was 70 km/h.
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181215
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Someone walked to school. The average speed of her first 30 miles was x, and the average speed of her later 60 miles was y. What's the average speed of this person on this 90 miles road?
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181215
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The numbers in the set are all multiples of n, for example {-2n, -n, 0, n, 2n, 3n,....}. Can we determine the value of n when n > 0?
1: - 7 is in the set.
2: 49 is in the set.
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181215
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f(x)=$$\frac{z}{x}$$.The definition domain of $$x_1$$,$$x_2$$ is the range of f(x). Is f$$(x_1)$$ less than f$$(x_2)$$ when $$x_1$$<$$x_2$$?
1：$$x_1$$>0
2：z > 0
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190124
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Does the parabola f(x)=a$$x^{2}$$+2x-2 intersect with the line g(x)=-2x+3?
1：f(1)=-1
2：a=2
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190124
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It took a person 15 minutes to reach B from A and 25 minutes to ride from B to A. The distance between A and B is 2 km. What's the average speed of the person?
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190124
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CD is orthogonal to AD. CD=2. AB=?
1：AC =4
2：AB=BC
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第一期
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If $$t^{3}=3$$, what is the value of $$t^{2}$$?
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第一期
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Students A and B skate together. Student A skates around a circle whose radius is 5 feet. B skates around a circle whose radius is 10 feet. When both A and B finish skating around their respective circles once, how much more distance does A skate than B, approximately?
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第一期
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What is the remainder when the positive integer n is divided by 3?
(1) The remainder when n is divided by 2 is 1.
(2) The remainder when n + 1 is divided by 3 is 2.
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第一期
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The lengths of the three sides of isosceles triangle are t-6, t-4, and 2t-20. Which of the following may be the perimeter of the triangle?
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第一期
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In trapezoid ABCD, AB//CD, AB=6, BC=6,∠C=60°,∠D=45°. CD=？
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第一期
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If n is a positive integer, what is the remainder when the positive integer n is divided by 5?
(1) If n=p+(p+1)+(p+2), and the remainder when p is divided by 5 is 1.
(2) If n=s(s+1)(s+2), and the remainder when s is divided by 5 is 1.
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第一期
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If n is a multiple of 5, what is the remainder when the positive integer n is divided by 6?
(1) The remainder when n is divided by 4 is 3.
(2) The remainder when n is divided by 12 is 3.
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第一期
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The temperature of a small hemispherical container was very high. Thus, it was put into a bigger hemispherical container which was filled with water to accelerate the cooling of this small hemispherical container. What was the volume of water left in the big container?
(1) The diameter of the large hemisphere is twice that of the small one.
(2) The volume of the large hemisphere is 8 times that of the small hemisphere.
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第一期
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Each bit of a five-digit password may consist of 0-9, a-z, A-Z. What's the number of different passwords in total, when all the elements can be repeated?
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第一期
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The total cost of n computers is c dollars for the company, and the company sold computers all at p dollars per computer. The company later purchased 100 computers at the same cost per computer, and sold them all at the price of $y per computer. What's the profit of this company from selling these two batches of computers?
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190124
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Is x>0？
1：$$x^{3}$$ < $$x^{2}$$
2：$$x^{4}$$ < $$x^{3}$$
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190124
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What's the maximum prime factor of 2205?
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