1、1. What is the value of ? 2. Pablo buys popsicles for his friends. The store sells single popsicles for each, -popsicle boxes for each, and -popsicle boxes for . What is the greatest number of popsicles that Pablo can buy with ? 3. Tamara has three rows of two -feet by -feet flower beds in her garde
2、n. The beds are separated and also surrounded by -foot-wide walkways, as shown on the diagram. What is the total area of the walkways, in square feet? 4. Mia is “helping” her mom pick up toys that are strewn on the floor. Mias mom manages to put toys into the toy box every seconds, but each time imm
3、ediately after those seconds have elapsed, Mia takes toys out of the box. How much time, in minutes, will it take Mia and her mom to put all toys into the box for the first time? 5. The sum of two nonzero real numbers is times their product. What is the sum of the reciprocals of the two numbers? 6.
4、Ms. Carroll promised that anyone who got all the multiple choice questions right on the upcoming exam would receive an A on the exam. Which of of these statements necessarily follows logically? 7. Jerry and Silvia wanted to go from the southwest corner of a square field to the northeast corner. Jerr
5、y walked due east and then due north to reach the goal, but Silvia headed northeast and reached the goal walking in a straight line. Which of the following is closest to how much shorter Silvias trip was, compared to Jerrys trip? 8. At a gathering of people, there are people who all know each other
6、and people who know no one. People who know each other hug, and people who do not know each other shake hands. How many handshakes occur? 9. Minnie rides on a flat road at kilometers per hour (kph), downhill at kph, and uphill at kph. Penny rides on a flat road at kph, downhill at kph, and uphill at
7、 kph. Minnie goes from town to town , a distance of km all uphill, then from town to town , a distance of km all downhill, and then back to town , a distance of km on the flat. Penny goes the other way around using the same route. How many more minutes does it take Minnie to complete the -km ride th
8、an it takes Penny? 10. Joy has thin rods, one each of every integer length from cm through cm. She places the rods with lengths cm, cm, and cm on a table. She then wants to choose a fourth rod that she can put with these three to form a quadrilateral with positive area. How many of the remaining rod
9、s can she choose as the fourth rod? 11. The region consisting of all points in three-dimensional space within units of line segment has volume . What is the length ? 12. Let be a set of points in the coordinate plane such that two of the three quantities and are equal and the third of the three quan
10、tities is no greater than this common value. Which of the following is a correct description for 13. Define a sequence recursively by and the remainder when is divided by for all Thus the sequence starts What is 14. Every week Roger pays for a movie ticket and a soda out of his allowance. Last week,
11、 Rogers allowance was dollars. The cost of his movie ticket was of the difference between and the cost of his soda, while the cost of his soda was of the difference between and the cost of his movie ticket. To the nearest whole percent, what fraction of did Roger pay for his movie ticket and soda? 1
12、5. Chlo chooses a real number uniformly at random from the interval . Independently, Laurent chooses a real number uniformly at random from the interval . What is the probability that Laurents number is greater than Chlos number? 16. There are 10 horses, named Horse 1, Horse 2, , Horse 10. They get
13、their names from how many minutes it takes them to run one lap around a circular race track: Horse runs one lap in exactly minutes. At time 0 all the horses are together at the starting point on the track. The horses start running in the same direction, and they keep running around the circular trac
14、k at their constant speeds. The least time , in minutes, at which all 10 horses will again simultaneously be at the starting point is . Let be the least time, in minutes, such that at least 5 of the horses are again at the starting point. What is the sum of the digits of ? 17. Distinct points , , ,
15、lie on the circle and have integer coordinates. The distances and are irrational numbers. What is the greatest possible value of the ratio ? 18. Amelia has a coin that lands heads with probability , and Blaine has a coin that lands on heads with probability . Amelia and Blaine alternately toss their
16、 coins until someone gets a head; the first one to get a head wins. All coin tosses are independent. Amelia goes first. The probability that Amelia wins is , where and are relatively prime positive integers. What is ? 19. Alice refuses to sit next to either Bob or Carla. Derek refuses to sit next to
17、 Eric. How many ways are there for the five of them to sit in a row of 5 chairs under these conditions? 20. Let equal the sum of the digits of positive integer . For example, . For a particular positive integer , . Which of the following could be the value of ? 21. A square with side length is inscr
18、ibed in a right triangle with sides of length , , and so that one vertex of the square coincides with the right-angle vertex of the triangle. A square with side length is inscribed in another right triangle with sides of length , , and so that one side of the square lies on the hypotenuse of the tri
19、angle. What is ? 22. Sides and of equilateral triangle are tangent to a circle at points and respectively. What fraction of the area of lies outside the circle? 23. How many triangles with positive area have all their vertices at points in the coordinate plane, where and are integers between and , i
20、nclusive? 24. For certain real numbers , , and , the polynomial has three distinct roots, and each root of is also a root of the polynomial What is ? 25. How many integers between and , inclusive, have the property that some permutation of its digits is a multiple of between and For example, both and have this property.
