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191031
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Of the 60 cars at a certain store, 20 cars have sunroof, 30 cars have windshield. How many cars have both sunroof and windshield?
(1)15 cars have neither sunroof nor windshield
(2)40 cars have either only sunroof or only windshield
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191031
|
$$\frac { m } { n } < \frac { n } { m }$$ ?
(1)m>n
(2)mn>0
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191031
|
Three positive integers x y z, satisfying 5 < x < y < z < 11, what is the value of z?
(1)x = 7，y = 8
(2)x, y are odds
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191031
|
Two sqaures both are 10x10. Is the shaded area 25?
(1)P is on the diagonal line of ABCD
(2)CD and PQ is perpendicular
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191031
|
There are five numbers: 1 2 4 x 6, what is the value of x?
(1)there is only one mode in this group and it is equal to median
(2)the mean is an integer
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200301
|
Is x a factor of 24?
(1)3x is a factor of 48
(2)5x is a factor of 60
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200301
|
Is a five-digit number “ababa” divisible by 3?
(1)a is divisible by 3
(2)b is divisible by 3
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200301
|
x is a two-digit number, and the unites digit of x is greater than 1. What is the unites digit of x?
(1). the units digit of $$x^2$$ is the same as the units digit of x
(2). the units digit of $$x^3$$ is the same as the units digit of x
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200301
|
DS：∣2X-Y∣=∣2Y-X∣?
(1). X=Y
(2). Y>0
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200301
|
A sequence 1,2,3,4,5,11, x, and x is a positive integer, is x≥4?
(1). The median of the sequence is 4
(2). x ≥ the median of the sequence
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200301
|
If a, b and c are three integers, is at least one of them even?
(1)a+b = even
(2)a+c = even
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200301
|
If △ABC is an isosceles triangle, what is the ratio of the height to base?
(1)The three sides of △ABC are equal
(2)One of the angles of △ABC is 60°
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190302
|
a,b,c,d are positive integers. x,y are not integers. x=$$a\sqrt{b}$$,y=$$c\sqrt{d}$$. Is $$\sqrt{xy}$$ an integer?
1：$$\sqrt{ac}$$ is a positive integer.
2：$$\sqrt[8]{bd}$$ is a positive integer.
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190302
|
The cylinder is placed obliquely on the horizontal table EF. There is a small amount of water in the cylinder, and the water surface is the plane AB. BC=3. BD=？
1：∠ADE=60°
2：CD=3
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191222
|
If the values of the slope and the y-intercept of line g are positive, and the values of the slope and the y-intercept of line k are positive, is the x-intercept of line g greater than the x-intercept of line k ?
(1)The slope of line g is greater than the slope of line k
(2)The y-intercept of line g is greater than the y-intercept of line k
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191222
|
As shown in the figure above, What's the value of ∠B ？
1：AE = CD
2：AE || CD
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191222
|
A and B are two different kinds of pipes. The radius of A is 1.5 times the radius of B. The rate of water injection of both pipes is proportional to the area of the circle of the injection hole of the pipe. How many hours will it take for pipe B to fill the empty container with water?
Condition 1: pipe A needs 14 hours to fill the empty container with water
Condition 2: rate ratio A:B=3:2
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191222
|
P（X）=ax²+bx+c，a≠0，P(-1)=0，P(3)=0. Is P(5)>0？
Condition 1: P(0)=3
Condition 2: P(-4)-P(-3)<0
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191222
|
X,y,z are consecutive positive integers and x < y < z，is x+y+z divisible by 10?
1：x+z is divisible by 10
2：y is divisible by 10
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191222
|
Given that z is a positive number, what is the value of xz ?
1：xz=-3x
2：xz=3x
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