Square numbers hold key to this month's puzzles

Puzzle author George Yu has focused the February "Fun with Math" puzzles on square numbers. Have a try at this new Young Saint Louis.com math contest.

Some of these answers may require some trial and error. But, that's all right. Not all answers to math questions come in a clear formula.

After all, some answers to life's most complicated questions started with an observation or educated guess. Then, the formula came out of a person's quest to prove his or her first guess.

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

The monthly "Fun with Math" contests follow the same rules YSL.com has followed 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 February.
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: