190207
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The selling price of the goods remains unchanged, but the reduction in cost leads to an increase in profit from 10% to 20% of the selling price. After cost reduction, it will be $200. What is the initial cost?
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190207 还原机经选题
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a,b,c,d are positive one-digit integers. ac+bc+ad+bd=65. |a+b-c-d|=?
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190207
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x < $$\sqrt{\frac{1.22}{1.68}}$$?
1:x < $$\frac{11}{13}$$
2:x < $$\frac{ \sqrt{3}}{2}$$
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190207
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Two machines of the same model work together and can complete a certain task in k hours. If three machines of this model work together, k -2 hours can complete the same task. k =?
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190207
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It si given that: d=$$2^{64}$$ , $$d^{d}$$=$$2^{k}$$. So what is the value of k
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190207
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∠A=90°, AB=AC. Circle O inscribed on triangle ABC. The radius of the circle is . AO=?
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190207
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It is given that: 0 < x < z < y < 1. When x replaces y, which option has a smaller value?
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190207
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The distance between the bottom of the two wires is 60m. What is the top distance between the two wires?
1: The difference between the height of two lines is 25m.
2: The sum of the height of the two lines is 70m.
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190207
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A cuboid container is made of plastic. The length, width and height of the cuboid cavity inside are x, y and z respectively. The thickness of the six sides is 1. What's the volume of the plastic used to make this container?
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190207
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If integers between 1 and 238 will be typed with the keyboard, what is the minimum number of times to tap 9?
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190207
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The average of the three numbers is 15. What's the median?
1: The largest number is twice the smallest one.
2: The sum of the largest number and the smallest number is 30.
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190207
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The salesman's salary consists of a basic salary of $600 and a commission. The commission is calculated as 8% of the amount of these sales that are over $2000. A salesman is paid $840 and $1080 for two months. What is the total sales volume of the two months?
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190207
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There are three colors of candy in an opaque bag, including two white candy, three red candy and one blue candy. Two candies will be taken out randomly from this bag. What's the probability of taking at least one white candy?
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190207
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The radius of the circle O is r. AO is perpendicular to OB. What is the area of the shaded part?
1:∠BAC = 30°
2:∠CAO = 30°
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