Five word problems in November Math Mania

Math Mania for November will feature five word problems that should test your math skills. Try it today.

Young Saint Louis.com's math competition has been intense for both September and October. In both of those earlier games, there have been multiple winners. (To check the October winners and answers, click here.)

The November competition focuses on your ability to solve puzzles that are set forth as words, not numbers. Of course, the answers will be in numbers.

Ms. Amy Ruzicka, the math teacher at St. Gabriel School in south St. Louis, is the creator of Math Mania. This is her second year of providing the puzzles for Young Saint Louis.com.

Let's see how you do with the different type of puzzles. If you have friends who haven't entered, tell them about the monthly feature and invite them to enter. Maybe they'd like to have fun with math too.

The rules for Math Mania are the same as last year. Each month, the contest calls for you to give answers to five or six math brainteasers.

Then, you submit your answers, using the form attached below with the questions. If you answer all the questions correctly, you'll have a chance to win a Borders book certificate.

We'll award 2 or 3 $10 book certificates each month, if there are enough winners.

Because so many of you submitted all-correct answers in October and September, YSL.com awarded three book certificates.

To enter the November Math Mania competition, fill out the attached entry form and give answers to the five questions. Follow contest instructions and fill out the entry form carefully so, if you're a winner, we can send your prize to the right address.

In the December YSL.com edition, we'll publish a new set of teasers. We'll also include another article giving the answers to the November puzzles. We'll publish names of any Borders book certificate winners.

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

1. 1. I'm thinking of a number. If I add a half, a fourth, and a ninth of it together, I get 62. What's my number?

Answer: ___________

2. I'm thinking of another number.

The number is:

Not a multiple of 3.
The product of two primes.
Less than .
Greater than twice the square root of 625.
Not a multiple of 2.

Answer: ___________

3. You guessed it! I'm thinking of yet another number. To help you figure it out, I've given you several clues:

The number is not an odd number.
It has exactly four factors.
If you reverse the digits a prime number is formed.
The sum of the digits is a two-digit prime number.
The number is less than the square root of .
One of the digits is a square number.

Answer: ___________

4. Last time, I promise! Use the clues to find my number.

It's greater than and less than .
is one of its factors.
It is a multiple of 13.

Answer: ___________

5. 5. O.K., I lied. One more…

Now I'm thinking of a telephone number.

Each digit is different.
The product of the sixth and seventh numbers equals the third number.
The fourth, eighth, ninth, and tenth numbers are multiples of 3.
The sum of the fourth and sixth numbers equals the sum of the fifth and eighth numbers.
The second, third, sixth, and seventh numbers are powers of 2.
The first, fifth, seventh, and tenth numbers are prime.

Answer: ___________