Middle School Math Contest: Test questions form the final round ,5 April 2003 
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  1. If 5 x = 1 + 2 + 3 + 4 + 5, what is the value of ♦?

 

1.

  1. If  inches represent 180 miles on a map, how many miles does  inches represent?

 

2.

  1. Ten years ago, Al was as old as Keith is now.  In how many years from now will Keith be as old as Al is now?

 

3.

  1. For what value of does ?

 

4.

  1. What is one-half of the reciprocal of 0.004?

 

5.

  1. Joe can do one-third of the job in two-thirds of an hour.  How many hours will it take him to do the complete job?

 

6.

  1. If x + y = 5,  x + z = 8,  and y + z = 11, what is the value of x + y + z?

 

7.

  1. If fence posts are set 6 feet apart, how many fence posts are needed to enclose a 30-foot by 18-foot field?

 

8.

  1. Seven identical cubes are to be joined into one unit by cementing a complete face of one to a complete face of another.  What is the maximum number of uncemented faces that can result?

 

9.

  1. What is the value of ?  Express your answer as a common fraction.

 

10.

  1. What is the time 456 minutes after 7:00 am?  (Be sure to indicate am or pm.)

 

11.

  1. If , what is the value of k?

 

12.

  1. What is the probability that, in its spelling, a randomly chosen day of the week uses the letter “u”?

 

13.

  1. Janna’s average score on five 100-point tests was 80.  Her score on the sixth test raised her mean score two points.  How many points did she score on the sixth test?

 

14.

  1. What is the sum of a set of five consecutive integers if the median of the set is 20?

 

15.


  1. Pat paid  of the restaurant bill, Jan paid  of the bill, and I paid the rest, $1.20.  How much was the total restaurant bill in dollars and cents?

 

16.

  1. What is the area of a square with a perimeter of ?

 

17.

  1. If 5% of 5% equals 10% of n%, what is the value of n?

 

18.

  1. The diameter of a circle is increased so that the circumference increases by 20%.  By what percent does the area increase?

 

19.

  1. If A ☼ B = (A x B) – B, then what is (3 ☼ 4) ☼ 5?

 

20.

  1. If all the multiples of 3 and all the multiples of 7 are removed from the set of integers from 1 to 100, how many integers remain?

 

21.

  1. What common fraction is equivalent to ?

 

22.

  1. What is the largest value of x less than 2 for which 5/x is an integer?

 

23.

  1. If , what is the value of ?

 

24.

  1. What is the probability that a randomly chosen positive integer less than 50 is a perfect square or a perfect cube?

 

25.

  1. A container of eye drops contains 30 ml.  The drops are used three times daily and each time 0.05 ml is used in each eye.  How many days will the container last?

 

26.

  1. Amy and Belinda each roll a sheet of 6-inch by 8-inch paper to form a cylinder.  Amy tapes the two 8-inch edges together.  Belinda tapes the two 6-inch edges together.  What is the difference in the volumes of the two cylinders?

 

27.

  1. A drinking glass is shaped like a cylinder with inside diameter of 3” and height of 6”.  The glass is half full of water.  A 2” diameter ball is lowered into the water slowly until the ball is half submerged.  How much did the water level rise in the glass when the ball was placed in the water?

 

28.

  1. Jack and Jill went up the hill at a rate of 4 miles per hour.  Once at the top, they returned on the same path at a rate of 6 miles per hour.  What was their average rate?

 

29.

  1. What is the smallest positive integer that uses only the digits 0 and 1 and is divisible by 45?

 

30.

 

Tie-breaker: (show your work) Adding the same positive number to the numerator and denominator of a positive fraction

 

 sometimes results in a number that is smaller than the original fraction.  For what positive fractions is this true?