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190321
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x < y. Is x > 0?
1:$$x^2+y^2>0$$
2:$$x^3+y^3<0$$
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190321
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A,B and C donated money to the disaster area. A contributed $5 less than B. B donated 3 times as much as C. The trio donated a total of $44. How many dollars did C donate?
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190321
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$$\frac{20! 10!}{2! 5! 5!}$$can be divided by $$10^n$$. What's the largest value of n?
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190321
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$$\frac{7x}{(-2x^2+4)^{\frac{1}{2}}}$$ isn't a real number. What's the range of x?
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190124
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The general term of the sequence of equal difference numbers is $$a_{n+1}$$=$$a_n$$+4.
 .$$a_6$$=?
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190124
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20 people donated some money. Each person can only donate $9, $10, $11. What's the average donation of these 20 people?
1: The number of people who donated $9 is equal to the number who donated $11.
2: The number of people who donated $9 is less than the number who donated $10.
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190124
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The rectangle in the design drawing is 11 inches in length and 8.5 inches width. The diamond is formed by connecting the midpoint of each side of the rectangle. The length of the corresponding garden to this design drawing is 44 feet. What is the area of diamond area in the garden? （1feet=12inch）
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190124
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Is x > 5？
1：$$x^{2}$$ > 25
2：2x+7 > 0
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190321
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The distribution of students' grades in A and B is shown in the following table. Is the average grade of class A higher than that of class B?
1: x= 3, y=4
2: The three students with the lowest scores in class A all scored 0. The two students with the lowest scores in class B all scored 0.
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190321
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$$a_1 < a_2 < a_3$$,$$a_1$$,$$a_2$$,$$a_3$$ are integers. Is the average of these three numbers larger than the median of them?
1:$$\frac{a_1+a_3}{2} - a_2 = 3$$
2:$$a_3 - \frac{a_1+a_2+a_3}{3} = 250$$ , $$a_1 - \frac{a_1+a_2+a_3}{3} = -150$$
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190321
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m and n are both 3-digit numbers. Is m>n？
1：The unit digit of m is less than n.
2：The sum of m's hundreds digit and tens digit is greater than that of n.
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190415
|
S is the total volume of 16 balls whose diameters are 1. C is the volume of 16 cylinders with a diameter of 1 and a height of 1.$$\frac{s}{c}$$=?
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190415
|
x is a positive integer. Is the remainder of x over 12 less than 8?
1: The remainder of x over 48 is 8.
2: The remainder of x over 50 is 9.
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190415
|
In parallelogram ABCD, AE=a, EB=b, BN=a, NC=b, CH=a, DH=b, MD=b, AM=a. What is the area of the quadrilateral EMHN?
1: The perimeter of the quadrilateral ABCD is 48.
2: The area of quadrilateral ABCD is 144.
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190310
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There are 20 donations in the company. The amount of donation is only $9, $10, $11. What's the average number of donations for these 20 people?
1: The number of people who donate $9 was the same as the number who donate $11.
2: The number of people who donate $9 was more than the number who donate $10.
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190415
|
In the sequence {$$a_n$$}, $$a_1$$=3,$$a_2$$=5,$$a_n$$=$$a_{n-1}$$+$$a_{n-2}$$(n≥3).$$\frac{a_24}{a_20}$$=?
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190215
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The square is inlaid with an octagon. The circumference of the octagon is 16. What's the circumference of the square?
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190215
|
The line $$l_1$$ goes through (5,p) and (1,3). The equation of line $$l_2$$ is x-2y-6=0 . What is the value of p when $$l_1$$ parallels to $$l_2$$ ?
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190215
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The probability of event a is X. Possibility of event B is Y. The possibility of simultaneous occurrence of event AB is Z. What is the possibility of at least one event happen in A and B?
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190215
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The rectangle is x in length and y in width. If the length increases by 20%, the width increases by 30%, and the area of the rectangle increases by what percentage?
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