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181215
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S = {1,2,3,4,5}, A,B are subsets of S, Ac, Bc represent the sets belonging to S but not belonging to A,B respectively. Ac∩B=？
1: A∩B={2}
2: A∩Bc={4}
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181215
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x is a positive integer. Is $$x^{2}$$+3x+45 divisible by 9?
1: is divisible by 3.
2: is divisible by 225.
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The circumference of a round table is 176. Someone is going to cover it completely with a square tablecloth, and all the extra parts around are longer than 10. What is the minimum side length of the tablecloth?
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181215
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The total weight of seven boxes of different weights is known. What is the median weight of these seven boxes?
1: The average weight of the four lightest cases is given.
2: The total weight of the four heaviest boxes is known.
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181215
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There were 80 walnuts and 40 peanuts in the box. After putting some walnuts into the box, walnuts accounted for 75% of all nuts. How many walnuts were put into the box?
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181215
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In parallelogram ABCD, AB=AD. AC=？
1：BD=2
2：AB=2
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181215
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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 totally?
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181215
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In the parallelogram ABCD, AB = 8. What is the area of this parallelogram?
1：∠DAB=150°
2：BC=12
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181215
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A person invested x dollars in a project with an annual simple interest of y%. z% of the profit related to one year had to be used for tax payment. How much was the tax he payed?
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181215
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Express the following sentence with algebraic expression: decrease the product of number x and 3 by 2, then increase the result by 120 percent of y
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181215
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AB//CD, AB=BC=6, ∠CBA=60°, ∠CDA=45°. CD=?
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181215
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There are 20 cars in a taxi company. The number of blue cars is larger than 10. The rest are red and green cars. How many are there in green?
1: The number of green cars is five times that of red cars.
2: There are 6 green cars and red cars in total.
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181215
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The triangle ABC is inscribed on the circle O. The radius of the circle is 1. Center O is on line AC. AB = BC. What is the area of triangle ABC?
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181215
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There are two kinds of coins in the piggy bank, 30 cents and 24 cents. How many coins are there of each kind?
Condition 1: All coins add up to 102 cents.
Condition 2: There are 4 coins in the piggy bank.
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($$\frac{1}{2} - \frac{1}{3}$$)+($$\frac{1}{3} - \frac{1}{4}$$)+($$\frac{1}{4} - \frac{1}{5}$$)=?
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190603
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It is given that f(x)=1-x, What is value of “ -f{ f(-(1-x))}”
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190603
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Is n the difference between two prime numbers?
1: n = 11
2: (n-7) (n-11) = 0
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190603
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The function of a straight line in the rectangular coordinate system is y=5x. If a straight line K is perpendicular to line y=5x, which of the following could be the expression of the line K ?
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The four sides of the square is tangent to the circle, as shown in the picture. The radius is 0.5. What is the area of the shaded part?
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A rope with uniform thickness of 10cm weighs 500g. How many kilograms does the rope with length of 2m weigh?
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