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Grade 5

1997 Team Round 3

Team Rounds in the Math Masters Competitions are timed (15 minutes), and calculators are allowed.

Note: Test Preparation Packets containing hundreds of problems (fact drills, individual and team) from previous years' competitions can be ordered from Math Masters of Minnesota.

The pie chart below shows land ownership in County Y.

Use the information presented in the graph above to answer questions 1-4.

1. How many acres of land in County Y are owned by the U.S. Forest Service.

2. How many acres of land in County Y are owned by the State?

3. How many acres of land make up County Y?

4. What is the measure of the central angle of the sector labeled Private?

5. Some of the 25 balls in a bag are red, some are green, and the others are blue. They are all of the same size and shape. When a ball is drawn at random, the probability that it is blue is 36%. If there are 4 red balls in the bag, find how many green balls are in the bag.
6. When 23 of Mr. Gopal's students took a test, the average score was 80 points. Two more students took the same test the following day. One of them scored 73 points. How many points did the other student score if the class average for all 25 students was still 80 points?
7. To get an A in Reading, Jamini must take five quizzes and must average at least 90 points on the five quizzes. After four quizzes, her average is 88 points. What must be her minimum score on the fifth quiz for her to get an A in Reading?
Use the following information to answer questions 8-10.

One number is missing from the following list.

60, 51, 68, 73, 68, 68

8. What is the mode of the seven numbers?

9. What is the median of the seven numbers?

10. The mean of the seven numbers is 63. What is the missing number?

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