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: