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191222
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There are red, green, white balls in a jar, with a number of 25 in total. What is the number of red balls?
(1)The number of red balls is one less than the sum of the number of green balls and white balls
(2)The number of red balls is three times the number of green balls
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191222
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There are 10 pairs of socks of different colors and the two socks that are in pair are the same. Take out 12 socks from the ten pairs and what is the least number of socks in pairs of these 12 socks?
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191222
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15% of the 500 employees in a company are managers. One year later, the number of managers increased by 12% and the number of employees increased by 25%. What percentage of the total employees are managers now?
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191222
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1/(n+1)<1/31+1/32+1/33<1/n,what is the value of n?
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191222
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If 5x-y=59, and y is an integer from 1 to 18, inclusive. What is the probability that x is also an integer?
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191222
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There is a function: F(x)=y. If x and y are real numbers, and x+y=xy, which of the following is correct to describe the values of F(x) ?
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191222 还原机经选题
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Known that -1 and 3 are the two roots of f (x) = ax ^ 2-bx + c, Is f(1)>0?
(1)f(0)=2
(2)f(-3)>f(-4)
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191222 730高分节-数学测试
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It is known that: 1^2+2^2+3^2+....+ 10^2=n, so 2^2+4^2+6^2+..8^2+...+18^2+ 20^2=?
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191222
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In a computer science class, students can study C++ and Java. The number of studying C++ is a, the number of studying Java is b, and the number of studying both is p. If the number of studying neither is m, which of the following can express the total number of students in that class in terms of a, b, m, and p?
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191222
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It takes 4.5 hours for car A to travel 270 miles and car B travels the same distance at a speed of 10 mile/h. How many hours less does it take for car A to travel the whole distance than car B?
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191222
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Is quadrilateral ABCD a rectangle?
(1) two adjacent angles are right angles
(2)two diagonals are equal
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191222
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What is the value of $$ ( \sqrt { 2 } -1 ) ^ { - 1 } =$$?
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191222
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Is the average score of 21 students greater than 80?
(1)The median is 91
(2)The least score is 70
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191222 730高分节-数学测试
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Is axy > bxy?
(1)ax > ay
(2)bx > by
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191222
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x%*40 is equal to y,what is the value of 10x, in terms of y?
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191222
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A triangle with a length 6 for one of the sides is inscribed in a circle. Is the triangle a right triangle?
1: The other two sides of the triangle are equal
2: The perimeter of the circle is 6π
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191222
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DS: There are 5 different positive integers with a median of 55. What is the value of the largest number?
(1) The average of these 5 numbers is 52
(2) The sum of the smallest two numbers is 92, and the sum of the largest two numbers is
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191222
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PS: When a positive integer n is divided by 14 , the remainder is 2, what is the remainder when n is divided by 28?
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191222
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A has x apples and B has y apples; when A gives B 6 apples, A has as many apples as B; when B gives A 6 apples, A has twice as many apples as B. How many apples does A and B have in total?
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191222
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$$\frac { 1 \frac { 1 } { 2 } } { 1 \frac { 1 } { 5 } } = x \times \frac { 1 \frac { 1 } { 5 } } { 1 \frac { 1 } { 2 } }$$
,What is the value of x?
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