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A guest-written Math Mania for May

Math Mania creator Amy Ruzicka is taking advanced courses at Webster University, in addition to teaching grade school math. For the May Math Mania, she asked one of her college math professors to write a guest feature.

The May questions were created by Dr. Andrea Rothbart, a professor math at Webster.

This edition of Math Mania also will be the last for the 2005-06 school year. But, the feature will be back when the 2006-07 school year starts again in the fall.

Ms. Ruzicka again will be the author of the math feature.

She promises to have a wide variety of math puzzlers. This year, some of the monthly features were regular math questions. But, she also included "scary story" writing on math and a math cartoon feature. Last month, she asked readers to design five new Olympic events based on math.

(For a look at the April answers for the Math Mania contest, click here.)

The entry process for the April version of Math Mania is the same. Also, prizes will be the same. There will be up to three $10 Borders gift certificates awarded to the top three entries.

How to enter:

  1. Print out the following entry form.
  2. Fill out your name, address and telephone number.
  3. Answer all six of the number problems.
  4. Put your completed entry into a stamped, addressed envelope.
  5. Mail your entry to:

Math Mania Contest
Young Saint Louis.com
813 Rotherham Dr.
Ballwin, Mo. 63011

(All entries must be postmarked by the
15th of the month to be eligible.)

-----------------------Clip here to make entry form-----------------------

Entry for May 2006, Math Mania Contest:

Name: __________________________________ Age: _____

Address: _________________________ School: ___________

City: _____________________ State: ______ Zip: __________

Contact phone: (_____) _____________________

 

May Math Mania Challenge
Written by Dr. Andrea Rothbart,
Mathematics Professor at Webster University

  1. A round pizza with diameter 16 inches is placed on a circular platter whose diameter is 20 inches. What percentage of the plate is occupied by the pizza?

  2. Of 600 apples harvested, every third apple was too small, and every fourth apple was bruised. The remaining apples were perfect. How many perfect apples were there?

  3. A set of 5 positive integers satisfies all of the following: Their average is 5; their median is 5; and their only mode is 8. What is the difference between the largest and smallest numbers in the set?

  4. If a 2-inch cube of silver is worth $400, how much is a 5-inch cube of silver worth? (Note: a 2-inch cube is a 2-inch by 2 inch by 2-inch cube.)

  5. If the number x is 50% larger than the number z, and the number y is 25% larger than the number z, then x is what percent larger than y?

  6. Last Christmas, Mrs. Ruzicka gave each of her nephews the same amount of money - namely as many dollars as she has nephews, and she gave each of her nieces the same amount of money - namely as many dollars as she has nieces. If Mrs. Ruzicka has more nieces than nephews and she gave away a total of $169, how many nephews does she have and how many nieces?
 

 

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