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190124
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All numbers in a set are positive. The numbers in the set can be expressed as n/n+1. n is a natural number. Is there at least one number in the collection greater than $$\frac{19}{24}$$?
1: $$\frac{5}{6}$$ is in the set.
2: There are five different numbers in the collection.
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190124
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The price of a commodity is three times the gross profit. The cost of this product is $20. What is the price of this product?
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190321
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The sides of the square ABCD and EFGH are 4 and 2, respectively. What is the perimeter of the four right triangles?
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190124 还原机经选题: 文字题&几何
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A shop sold 10 sets of TV in a week. What is the median of the daily sales?
1: At least 1 TV set was sold every day.
2: At most two TVs were sold every day.
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190124
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∠ABM=45°, EF//MN. Quadrilateral ABCD is rectangular. AB=？
1：AE=3
2：BF=15
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190321
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A six-digit code consists of four numbers and two letters. Each number comes from the numbers 1 to 9. Both letters come from 26 lowercase letters. How many different ways are there to create this code?
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190415
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f(x)=ax+b.f(3)=?
1：f(-2)+f(3)=0
2：f(2)+f(-1)=0
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190415
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Both tens and the unit digits of a two-digit number are greater than or equal to 1 and less than or equal to 4. What is the probability that the sum of the digits of this number is a multiple of 3?
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190415
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The radius of $$O_1$$ is R. The radius of $$O_2$$ is r. These two circles are tangent to each other and they are tangent to the quadrilateral ABCD. BD =?
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190321
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$$k^4$$can be divided by 32. What is the reminder of k when divided by 32?
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190321
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Teams A and B played basketball together. In the first half of the game, team A was 20 points behind team B. Which team won the game in the end?
1: In the second half of the game, team A won twice as many points as team B.
2: The total score of team B was 90.
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190321 还原机经选题: 文字题&几何
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A,B,C,D and E are in a line. If A stands in the front and B is the second one, how many ways can they be arranged?
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190321
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In the rectangular coordinate system, there is a line with a slope of 4. This line goes through the points (1,c), (d,2). Which of the following relations does c and d satisfy?
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190321
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n is a positive integer.$$10 \leq n \leq 48$$. The tens digit of n is twice the unit digit. n =?
1: n is odd.
2: n is a multiple of 7.
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190321
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The cylinder contains a total of 24 gallons of oil. The machine consumes 1.6 ounces per minute. After 12h, how many gallons of oil are left in the cylinder? (1 gallon =128 ounces)
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190321 还原机经选题: 文字题&几何
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It took 2.4 hours for A and B to perform A task together. If A and B perform the same task alone, the time that B spent was 1.5 times as much as that of A. How many hours did it take B to perform this task alone?
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190321 还原机经选题: 文字题&几何
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The iron ball with radius r was recast into a cylinder with radius R and height H. H=12R. H/r=？
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190321
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The length of the three sides of a right triangle is x,2x+2,2x+3. What is the area of the right triangle?
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190415 还原机经选题: 数论&代数
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12! can be divided by $$(4!)^{n}$$ but cannot be divided by $$(4!)^{n+1}$$ .n=?
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190415
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S=S={1,2,3,4,5,11,x}. x is a positive integer. Is ?
1: The median of S is 4.
2: x is larger than or equal to the median.
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