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181215
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S = PRT/100. Where S is the income, P is the investment amount, R is the annual simple interest, and T is the investment period. When the principal is $y, what is the two-year return on investment?
1: When the principal is $1000, the profit of the one-year investment is $40.
2: y = 8000.
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181215
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x,y are integers. Is x-y odd?
1: 2x+3y is odd.
2: 3x+2y is even.
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181215
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Two classes play 10 games, and the scores of the two classes are shown in the table below. Is the average score of class A higher than that of class B?
1: The minimum scores of each classes are 0.
2: f=4.
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181215
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A shopkeeper sells mixed nuts. Mixed nuts are a mixture of c and p, with an average price of $2.7 per pound. What is the ratio of c in mixed nuts?
1: The unit price of c is $3.6 per pound.
2: The unit price of p is $2 per pound.
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181215
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Is the quadrilateral ABCD square?
1：AB=BC=CD=DA
2：∠A+∠B=180°
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181215
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Alex went to UK, Netherland and Australia on business last month. His roaming phone charges in UK, Netherland and Australia were $0.1/minute, $0.2/minute, and $0.3/minute, respectively. What's the unit price of his roaming phone charges last month?
1: The ratio of his roaming call in UK, Netherland, Australia was 2:3:4.
2: He spent 27000 minutes on roaming calling last month.
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181215
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The temperature of the small hemispherical container was very high. Thus, it was put into the larger hemispherical container which was filled with water to accelerate the cooling of it. What was the volume of water left in the large container?
1: The diameter of the large hemisphere is twice that of the small one.
2: The volume of large hemisphere is 8 times that of the small hemisphere.
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181215
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There is an even chain hanging on a pulley. The chain is 5 meters long and weighs 4 kilograms. The chain lengths on the left and right sides of the pulley are a and b respectively. b=？
1: a = 1 m
2: r = 0.3 m
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181215
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Is the integer X a factor of 24?
1: X is a factor of 12.
2: X is a factor of 18.
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181215
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x,y,z are three consecutive odd integers. x < y < z. What`s the values of x,y,z, respectively?
1: 2y = x+z
2: x,y,z are prime numbers.
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181215
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Does the equation 2$$x^{2}$$+bx+8=0 have real solutions?
1: b < 0
2: lbl > 5
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181215
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The average of the six unknown integers is 42. Is the median of these six numbers less than 42?
1: All of the numbers are greater than 41.
2: The maximum number is 47.
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190603
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Is (a+b-c)(a+b+c)=a^2+b^2-c^2 ？
1：a^2-b^2=0
2：a^2+b^2=0
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181215
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The price of a coat is $90 in April and $80 in May. What's the total income in May?
1: The sales in May is 70% of that in April.
2: 170 coats were sold in April.
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181215
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A dice with even texture can be red, blue or green on each side. How many sides are red?
1: Throw the dice twice. The probability of a blue side facing up for the first time and a green side facing up for the second time is 1/18.
2: Throw the dice twice. The probability of a red side facing up for the first time and a green side facing up for the second time is 1/6.
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181215
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The price of a sofa is 500 dollars and that of a chair is 200 dollars. How much did a person buy each?
1: It costs 1200 dollars to buy sofas and chairs.
2: More than 1 sofa was purchased.
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190124 还原机经选题: 文字题&几何
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Does the parabola y=a$$x^{2}$$+bx+c intersect with x-axis?
1: a < 0
2: c > 0
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190124
|
Is $$\frac{x^{2}}{x^{\frac{2}{3}}}$$ ？
1：$$x^{2}$$-3x+2 > 0
2：$$x^{3}$$ > x
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190113
|
The equations of two lines are $$y_1$$=$$m_1$$x+$$b_1$$, $$y_2$$=$$m_2$$x+$$b_2$$. $$m_1$$, $$m_2$$, $$b_1$$, and $$b_2$$ are constants. $$m_1$$$$m_2$$$$b_1$$$$b_2$$=？
(1) The x-intercepts of two lines are -2 and 4.
(2) The y-intercepts of two lines are 6 and 4.
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190113
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According to the picture, ∠ABC=？
(1)D is the center of the circle.
(2)∠CAB=42°
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