St. Louis' Webzine for Kids
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January 2010 Vol. 11 Issue 1


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St. Louis History
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News Stories

The Robots Art Coming...
Robotics team
World robotics tourney

Heart transplant
Bike trip
Nutcracker
Stock market
Record fish

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Math
Math Answers

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January's "Fun with Math"

Using the process of elimination for answers

To start the new year, "Fun with Math" author George Yu wants you to figure out answers to the January puzzlers by a process of elimination, using what you know about two different things.

In some ways, the January questions have some things in common with the questions in the December, 2009, puzzlers.

In this month's competition, you'll know some of the characteristics of the objects. From those, you ought to be able to figure out how to solve the problems.

(To review the December contest, and learn the winners, click here.)

The monthly "Fun with Math" contests follow the same rules YSL.com has had for its math puzzlers for several years. They are:

  1. Print out the following entry form.
  2. Fill out your name, address and telephone number. (Print clearly please)
  3. Include the name of your school and math teacher.
  4. Answer the puzzle questions for January.
  5. Put your completed entry into a stamped, addressed envelope.
  6. Be sure to print the entry form so we can be sure of spelling.
  7. Mail the entry to:

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

(All entries must be postmarked by the
15th of January 2010
to be eligible.)

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

Entry for January 2010, Math Mania Contest:

Name: __________________________________ Age: _____

Address: __________________________________________

School: _____________________ Teacher: ________________

City: _____________________ State: ______ Zip: __________

Contact phone: (_____) _____________________

 

December Fun with Math Contest Challenge:
Different Characteristics Give Answers

  1. A farmer has only rabbits and chickens on her farm. She counts 10 heads and 26 legs. How many rabbits does she have? How many chickens does she have?

  2. An arthropod collector has only ants (six legs) and spiders (eight legs). Altogether, there are 15. He counts 98 legs. How many ants does he have? How many spiders does he have?

  3. Abby has only nickels and quarters. She has 25 coins, for a total of $2.65. How many nickels does she have? How many quarters does she have?
 

 


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