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190124
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The price of 1kg salad is fixed. Someone took 9 dollars and went to the shop. Then, he found that he remembered a wrong price. The price he thought was $0.2/kg less than the actual price. As a result, the weight of the salad that he bought was 0.5 kg less than that in his mind. How much is the actual value of 1 kg salad?
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190124 还原机经选题: 文字题&几何
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The traffic lights are alternating in the order of green, yellow and red. The time for the green, yellow and red lights is 45s, 5s, and 45s, respectively. What can be the longest time that the red light is on within 5 minutes?
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190124 还原机经选题: 文字题&几何
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Two numbers will be chosen from the sequence {1,2,3,5,6,10} and {1,2,3,5,7}, one from each sequence. What's the probability that the product of the two numbers is not 4?
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190124
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Candies were given to n students (n > 5). Did at least two students get the same amount of candy?
1: The total number of sweets is greater than .
2: The total number of sweets is greater than $$\frac{n^{2}-n}{2}$$.
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190124
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The time for machine A to produce 1000 sheets of paper is 1/2 of the time required for machine B to complete the same work. When machine A and machine B work at the same time, it takes 3 minutes to produce 1000 sheets of paper. If machine B works alone, how long does it take to produce 2000 sheets of paper?
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190124 还原机经选题: 文字题&几何
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There are eight numbers in a sequence. The minimum value is 5 and the range is 9. What is the ratio of the difference between the maximum value and the minimum value of the average value of the sequence and the range of the sequence?
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190124
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The stem of a plant is bent or straight. The flowers of the plant are only yellow or blue. The probability of a plant branch bending with blue flower is 3 / 32. The probability of a plant with straight branches and yellow flowers is 7 / 32. What's the probability of this kind of plant producing blue flowers?
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190124 还原机经选题: 文字题&几何
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The pulley has three wheels A, B and C. Circle A has a radius of 2. Circle B has a radius of 4. Circle C has a radius of 6. If circle A rotates 1.5 turns counterclockwise, how many turns does circle B and circle C rotate in total?
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190124
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How many factors does 441 have?
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190124 还原机经选题: 文字题&几何
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Three different letters are randomly from the 20 letters of A-T. How many kinds of possibilities are there for choosing three discontinuous letters?
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190124 还原机经选题: 文字题&几何 730高分节-数学测试
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There are 21 students in a class. Does the average score of all the students in this class exceed 80?
1: The minimum score is 78.
2: The median is 91.
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190124
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Is |x-y| > |x-z|？
1：|y| > |z|
2：x < 0
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190124
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$$\sqrt{24}$$+$$\sqrt{12}$$=2a$$\sqrt{3}$$.a=?
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190124
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abcd+b+c+d=？
1：d ≥ 294
2：$$a^{2}$$+$$b^{2}$$+$$c^{2}$$+d = 294
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190124
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[x] represents the minimum integer greater than x. Is x-[x] < 0?
1: x is positive.
2: x is irrational.
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190124
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There are three blue balls, five green balls and two red balls in an opaque box. Two balls are taken out randomly. What is the probability that one ball is blue and the other is green?
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190124
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e > d,Ls ed < 0?
1：e$$d^{2}$$ > $$e^{2}$$d
2：e+d=1
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190124
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The square side is 13. The lengths of all of the line segments where the shadow intersects the square are 6. What is the area of the shadow?
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190113
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A truck is used to transport olive oil. The density of olive oil is 50 pounds/feet³. The cylindrical tank of the truck is 6 feet in diameter and 9 feet in length. The empty truck is 11000 pounds. How many tons is the truck when it is full of olive oil? (1 ton = 2204.62 pounds)
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190113
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There is one decayed apple in five apples. Take 2 apples randomly from these 5 apples. What's the probability that one of these two apples is the decayed apple?
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