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1、Problem 1What is the difference between the sum of the first even counting numbers and the sum of the first odd counting numbers?SolutionProblem 2Members of the Rockham Soccer League buy socks and T-shirts. Socks cost $4 per pair and each T-shirt costs $5 more than a pair of socks. Each member needs
2、 one pair of socks and a shirt for home games and another pair of socks and a shirt for away games. If the total cost is $2366, how many members are in the League?SolutionProblem 3A solid box is cm by cm by cm. A new solid is formed by removing a cube cm on a side from each corner of this box. What
3、percent of the original volume is removed?SolutionProblem 4It takes Mary minutes to walk uphill km from her home to school, but it takes her only minutes to walk from school to her home along the same route. What is her average speed, in km/hr, for the round trip?SolutionProblem 5Let and denote the
4、solutions of . What is the value of ?SolutionProblem 6Define to be for all real numbers and . Which of the following statements is not true?for all and for all and for all for all if SolutionProblem 7How many non-congruent triangles with perimeter have integer side lengths?SolutionProblem 8What is t
5、he probability that a randomly drawn positive factor of is less than SolutionProblem 9Simplify.SolutionProblem 10The polygon enclosed by the solid lines in the figure consists of 4 congruent squares joined edge-to-edge. One more congruent square is attatched to an edge at one of the nine positions i
6、ndicated. How many of the nine resulting polygons can be folded to form a cube with one face missing?SolutionProblem 11The sum of the two 5-digit numbers and is . What is ?SolutionProblem 12A point is randomly picked from inside the rectangle with vertices , , , and . What is the probability that ?S
7、olutionProblem 13The sum of three numbers is . The first is four times the sum of the other two. The second is seven times the third. What is the product of all three?SolutionProblem 14Let be the largest integer that is the product of exactly 3 distinct prime numbers , , and , where and are single d
8、igits. What is the sum of the digits of ?SolutionProblem 15What is the probability that an integer in the set is divisible by and not divisible by ?SolutionProblem 16What is the units digit of ?SolutionProblem 17The number of inches in the perimeter of an equilateral triangle equals the number of sq
9、uare inches in the area of its circumscribed circle. What is the radius, in inches, of the circle?SolutionProblem 18What is the sum of the reciprocals of the roots of the equation?SolutionProblem 19A semicircle of diameter sits at the top of a semicircle of diameter , as shown. The shaded area insid
10、e the smaller semicircle and outside the larger semicircle is called alune. Determine the area of this lune.SolutionProblem 20A base-10 three digit number is selected at random. Which of the following is closest to the probability that the base-9 representation and the base-11 representation of are
11、both three-digit numerals?SolutionProblem 21Pat is to select six cookies from a tray containing only chocolate chip, oatmeal, and peanut butter cookies. There are at least six of each of these three kinds of cookies on the tray. How many different assortments of six cookies can be selected?SolutionP
12、roblem 22In rectangle , we have , , is on with , is on with , line intersects line at , and is on line with . Find the length of .SolutionProblem 23A large equilateral triangle is constructed by using toothpicks to create rows of small equilateral triangles. For example, in the figure we have rows o
13、f small congruent equilateral triangles, with small triangles in the base row. How many toothpicks would be needed to construct a large equilateral triangle if the base row of the triangle consists of small equilateral triangles?SolutionProblem 24Sally has five red cards numbered through and four bl
14、ue cards numbered through . She stacks the cards so that the colors alternate and so that the number on each red card divides evenly into the number on each neighboring blue card. What is the sum of the numbers on the middle three cards?SolutionProblem 25Let be a -digit number, and let and be the quotient and the remainder, respectively, when is divided by . For how many values of is divisible by ?Solution
