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190207
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There are three points in the xy-plane, A(a, b), B(c, d), C(d,c). Is AB=AC?
1:($$a^{2}$$-$$b^{2}$$)($$c^{2}$$-$$d^{2}$$)=0
2:($$a^{2}$$+$$b^{2}$$)($$c^{2}$$+$$d^{2}$$)=0
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190207
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The product of unit digit, tens-digit, and hundreds-digit of a three-digit number is 144. What is the tens-digit number when the three-digit number is minimum?
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190207
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The number of girls in a class are 1.5 times as many as that of boys. The number of girls learning French is the same as that of boys. The number of students learning French in the whole class accounts for one tenth of the total number. What is the proportion of boys who do not learn French in the class?
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190207
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x=?,y=?
1:25$$x^{2}$$-16$$y^{2}$$=161
2:$$x^{2}$$+2xy+$$y^{2}$$=19
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190207
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Square ABCD is divided equally into 100 small squares on average. How many small squares does diagonal AC intersect at least one point?
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190207
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$$a_1$$=56,$$a_2$$=57,$$a_3$$=59 .$$a_n$$=5n+$$a_{n-3} $$ (n≥4) Which of the following numbers belong to the sequence {$$a_n$$}?
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190207
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x,y are positive integers. (x-y)(x+y)=37.What is the value of y?
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190207
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When a driver runs a long distance, the boss will pay her $10 / h and $0.5/mile. She received a total of $100. How many miles did she drive this time?
1: The average speed is 50mile/h
2: She ran 5/12 of the way at 58 mile/h. The average speed of the rest of the journey was 39 mile/h.
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190207
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A person bought two sweaters and a belt at a discount. What is the average discount?
1: The sweater was 10% off.
2: The belt was 20% off.
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190207
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Is the area of a circle larger than that of a square?
1: The circumference of a circle is greater than the circumference of a square.
2: The diameter of the circle is larger than the side length of the square.
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190207
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x,y are positive integers. The reminder is 3 when x is divided by y . Is 6 a factor of x?
1: 2y is a multiple of 3.
2: x
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190207
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The average of six integers, U,V,W,X,Y,Z is 42. Is the median of these six numbers less than 42?
1: All of the numbers are no less than 41.
2: Y=47.
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190207
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$$n^{3}$$ is a four-digit number whose unit digit is 3. What is the unit digit of the sum of the four digits of $$n^{3}$$ ?
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190207
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Three different numbers are chosen from the five numbers, 0,2,4,5,6, to form three-digit numbers. If this three-digit number is a multiple of 5, how many different combinations are there?
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190207
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n is a positive integer. The reminder of n divided by 5 is equal to that of divided by 5 ,what is the value of n.
1: The reminder is 1.
2: n can divided by 6.
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190207
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Is the y-intercept of line l greater than 4?
1: The intercept of line l is equal to that of line y = 2x + 3.
2: The slope of line l is 5
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190207
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$$2^{16}$$*$$5^{10}$$=?
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190207
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x+3y+5z=0, x+2y+3z=6. x+y+z=?
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190207
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A factory works 22 days a month, 7.5 hours a day, and can produce 550 products per hour. But in the first seven days of December, due to circuit failure, no work was started. In order to catch up with the normal progress, how many more products should be produced in the following days of the month?
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190207
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|$$\frac{x^{2}}{x}$$|=? x≠ 0
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