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190215
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The vertex coordinates of quadrilateral ABCD are A (3,1), B (10,1), C (5,8), D (3,5). How many right angles are there in this quadrilateral?
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191020
|
If x and y are integers, and $$( x - y ) ^ { 2 } + 2 y ^ { 2 } = 27$$ , how many possible values of x?
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191020
|
If x and y are integers, and $$x^2+y^2 = 25$$, xy=12, how many possible values of x+y?
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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
|
What is the value of n when the average of the five numbers 1, 3, 4, n, 10 is equal to the median?
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190215
|
$$\frac{10n}{7}$$=k+$$\frac{q}{7}$$,n,q are positive integers smaller than 7. What is the maximum value of k?
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190215
|
Beef, chicken and bacon can be added between the two hamburgers. If the order of different kinds of meat is ignored, how many different hamburgers can be made?
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190215
|
There is a cube with six faces labeled. Someone is going to paint this cube with three colors, one for each side. The colors of adjacent faces are different. How many coating methods are there?
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191020
|
When m and n are divided by 7, the remainders are both 3, so what is the remainder when mn is divided by 7?
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191020
|
|x-2|=2x-10,what is the possible value of x?
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191031
|
What is the value of remainder when 2 ^ 5550 is divided by 7?
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|
190215
|
5$$x^{2}$$ - 2x - 39=0(x > 0).x=?
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191031
|
There are 10 cards numbered 1-10, respectively. 5 different cards are selected randomly from these 10 cards. What is the greatest value of difference between median and mean?
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191031
|
It takes Tom 15 mins to travel 2 miles from A to B, and 25 mins to return from B to A. If Tom travels the same route for this round trip with no stop, what is the average speed, in miles per hour, of Tom?
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191031
|
If |nx-8|≤4, then how many positive integers n that can make x exactly have two different integer solutions?
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191031
|
How many of these x that make the median and average of x, 1, 2, 3, 4 equal?
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|
191031
|
How many prime factors does 2730 have?
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191222
|
There is a set of numbers, in which $$a_0=0$$,$$a_1=1$$,$$a_2=1$$,....,$$a_n=a_{n-1}+a_{n-2}$$,What is the value of $$a_5$$.
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191222
|
|2-|2-x||=2,How many solutions do X have?
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191222
|
There is a number E, which is a four-digit number, and each digit is an even number; One number is O, which is also a four-digit number, but every digit is odd. There is currently a number W=E+O, and W is a number with five digits, so how many of the five digits of W can't be odd?
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