|
190415
|
x,y>0,$$\sqrt{x}$$-$$\sqrt{y}$$=?
1：$$\sqrt{x}$$-$$\sqrt{y}$$=8$$\sqrt{xy}$$
2：$$x^{2}$$-$$y^{2}$$=2xy
|
|
190321
|
The ratio of the three sides of a triangle is 5:12:13. The length of longest side of the triangle is 52. What is the area of a triangle?
|
|
190321 还原机经选题: 数论&代数
|
n is a positive integer. What is the reminder of when divided by 12?
1: n is even.
2: n is a multiple of 3.
|
|
190321
|
The line $$l_1$$ is perpendicular to the line $$l_2$$, whose equation is y=3x+4. What is the slope of $$l_1$$?
|
|
190321
|
Circle O is internally tangent to a square ABCD. The radius of circle O is 2m. What is the area of the shaded part of the graph?
|
|
190321
|
The area of a square is 36. What is the perimeter of this square?
|
|
190321
|
$$2^{x+y}*2^{-(x-y)}$$ = ?
1:x=2
2:y=4
|
|
190321
|
What is the sum of the interior angles of the octagon?
|
|
190321
|
ABCD is a parallelogram. BF=2. AE=？
1：∠ABE=10°；∠CBF=30°
2：∠ABC=40°；∠BAD=140°
|
|
190321
|
X and Y are two discrete primes. X=?, Y=?
1：X-Y=5
2：X+Y=9
|
|
190321
|
Five spaces will be filled with numbers 1-5 at random and use each number only once. What's the probability that these 5 numbers are arranged in order from large to small or from small to large?
|
|
190124
|
The size of the rectangular ground is 12 feet * 9 feet. If the ground is covered with square tiles whose length is 9 inches. How many tiles are needed? (1 foot = 12 inch)
|
|
190124 还原机经选题: 文字题&几何
|
The shop sold two shirts and one belt at a discount. What's the average discount?
1: Each shirt was 20% off.
2: The belt was 10% off.
|
|
190124
|
The swimming pool will be filled with water whose rate of flow is 50 L/min. The pool is 120 $$m^{3}$$ in total. How many hours is necessary to fill 2/3 of the pool?
|
|
190124
|
The positive integer p is less than 50. When p is divided by 7, the remainder is 1. p=?
1: When p is divided by 9, the remainder is 7.
2: When p is divided by 4, the remainder is 3.
|
|
190124
|
AB=9, BC=4. A,B,C are not collinear. Which of the following may be the distance of AC?
|
|
190124 还原机经选题: 文字题&几何
|
The x-intercept and y-intercept of line l are $$x_c$$ and $$y_c$$, respectively. What is the slope of line ?
1：$$x_c$$$$y_c$$>0
2：(1,1) is in the line .
|
|
190124
|
In sector AOB, ∠O=45°. The radius of the sector is 4. BC is perpendicular to OA. What is the area of the shadow?
|
|
190124 还原机经选题: 文字题&几何
|
Two circles are drawn with the two long sides of the rectangle ABCD as the diameter. The centers of the circles are E and F. EF intersects two circles at G and H, respectively. What is the circumference of the rectangle ABCD?
1:AE=9
2:EG=GH
|
|
190124 还原机经选题: 文字题&几何
|
The outermost player passes the ball layer by layer to the inner player. There are three players on the first layer, four on the second layer and three on the third one. How many kinds of passing methods are possible?
|