191020
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There is a triangle where the ratio of three internal angles is 5:15:16. What is the degree of the smallest angle?
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191020
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How many diagonals of a regular nonagon?
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191020
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What is the value of 1+2+3+4+5+6--+99+100 ?
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191020
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Taking three numbers out of twenty consecutive integers, then how many cases where the three numbers are not consecutive?
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191020
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Is√ab an integer?
1: √a is not an integer
2: √b is not an integer
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191020
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What is the value of the difference between the mean of the smallest thirty positive integers and that of the smallest thirty non-negative integers?
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191020
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The triangle ABC is a right-angled triangle, and B is the right angle. If a point D is on AC, is the triangle BCD an isosceles triangle?
(1) BD = AD
(2) D is the midpoint of AC
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191020
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It is given that a/(a+b)=5,what is the value of b/(a+b)
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191020
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It is given that:y = x^2+ bx+ 4, which of the following values about "b" can make that equation have no intersection point with x-axis?
I. -2
II. 0
III. 4
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191020
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Is x-y>0 ?
1:y<0
2:2x-y>0
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191020
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As shown in the figure, There is a table, in which the middle area is a rectangle with length of 100 inches and 75 inches in width. What is the value of approximate side length of the table?
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191020
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There is an initial capital of $ 10,000 used for investment, of which x $ are invested for project with return rate of 3%, ($ 10000-x) for project with return rate of 7%, finally the total interest is 480. What is the value of x?
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191020
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If 4^4^4=2^2^x, what is the value of x ?
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191020
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It is given that: $$T_n$$ = 1 + 2 +3+. . . + n, so is $$T_n$$ an odd number?
1: $$T_{n+1}$$ is odd
2: $$T_{2n}$$ is even
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191020 还原机经选题
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If abc, bca, and cab are three-digits positive integers, what is the smallest prime factor of the sum of these three-digits positive integers?
1:a+b=c
2:c=2
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191020
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p and q are different prime numbers. How many factors does A=paqb have?
1: a = 2, b = 3
2: p = 5, q = 7
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191020
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After Tom walked from A to B, he decided to start going back. When he reached 10% of the whole journey,what fraction of the total round trip is the trip he has traveled?
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191020
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It is given that:√x and √y are integers, which of the following must be an integer?
I. √x√y
II. √(x+y)
III. √x/√y
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191020
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If two lines are parallel, what is the value of x?
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191020
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As shown in the figure, a ball will move from point A to point E, so how many different ways to move?
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