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191222
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The range of the set S is 30, and the range of the set V is 70. The set T is made up of all the elements in the set S and set V, what is the minimum possible range of the set T？
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191222 730高分节-数学测试
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Given that k=0.xyzxyzxyzxyz…, what is the value of z ?
(1)1000k-k is divisible by 5
(2)1000k-k is an even integer
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191222 还原机经选题: 数论&代数 730高分节-数学测试
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If a, b, and c are positive integers, is $$2^a+2^b+2^c$$ a multiple of 10？
(1)b=c
(2)c=a+1
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191222
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As shown in the figure, a rectangle is inscribed in a semicircle, and the length and width are 16 and 8 respectively. What is the radius of the circle?
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191222
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There are ten cards marked with the numbers from 1 to 10 respectively. Draw two out of ten cards and never put them back. What's the probability that the sum of the two numbers on the two cards drawn is less than the average of the ten cards?
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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 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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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
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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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Set A and set B has the same number of elements. The number of elements in Set C is the sum of 1/4 the number of elements in Set B and 1/3 the number of elements in Set A. What is the ratio of the number of elements in Set C to the number of elements in Set A?
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200301
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One side of the parallelogram is 7 and the other is 6. Which of the following could be the area of the parallelogram?
I. 21
II. 42
III. 64
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200301
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$$\frac { 4 } { \frac { \sqrt { 5 } - 1 } { \sqrt { 5 } + 1 } } = ?$$
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200301
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If f(x)=ax+b，what is the value of f(3)？
(1)f(-2)+f(3)=0
(2)f(2)+f(-1)=0
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200301
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The cone has 4 sides (similar to 4-sided dice). The numbers on it are 1, 2, 3, 4 and now toss it twice. What is the probability that the sum of the two numbers is a multiple of 3?
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200301 还原机经选题: 数论&代数
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From 1 to 10, choose any two numbers to multiply, and the numbers can be selected repeatedly. What is the sum of all the products?
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