Find Puzzler answers; Win a prize

This is the second month for Young Saint Louis.com's Math Puzzler contest. We want you to have fun with math...and maybe win a prize.

Each month, we'll publish a series of six Math Puzzlers. These are for your entertainment. This is not a class assignment. But, we hope you'll have fun figuring out the answers.

Using the form below, you can submit your answers. We'll publish next month the names of those who answered all these questions correctly. We'll also get an explanation of the correct answers. (For results of the September Math Puzzlers, click here.)

We're offering an ADDED BONUS. We'll put all the correct entries into a hat and draw for up to three $10 gift certificates from Borders Book Stores.

A note: We've made these Math Puzzlers pretty challenging, especially for younger kids. We don't mind if you get help from a parent or older brother or sister. We encourage you to make this a family activity, if you'd like.

Here's how to enter:

1. Print out the following entry form.
2. Fill out your name, address and telephone number.
3. Give your answers to the six Math Puzzlers.
4. Put your completed entry into a stamped envelope.
5. Mail your entry to:
   
   Math Puzzler Contest
   Young Saint Louis.com
   7733 Forsyth Blvd., Suite 1450
   Clayton, MO 63105
   
   
6. All entries must be postmarked by the 15th of the month to be eligible for a book prize.

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

Entry for October, 2001, Math Puzzler Contest

Name: _____________________________________

Address: ___________________________________

City:_____________________, State:______ ZIP___________

Contact phone no.(____)____________________

 

The Math Puzzlers
(Oct. 2001)

 

1. What is the sum of the spots on the left side of the stack of dice?

Answer:___________

 

2. What is x?

1+2=5 2+3=13 4+5=41 5+6=61 6+7= x

Answer:___________

 

3. What is the total of these six fractions?

1/3 + 3/1 + 3/6 + 6/3 + 4/8 + 8/4 = ?

Answer:___________

 

4. Suppose you have two egg timers, a five-minute and a three-minute. How can you use these two measuring devices to time an egg that would be boiled for exactly two minutes?

Answer:___________

 

 

 

 

 

5. Add arithmetical symbols (+, -, x, ÷) between the numbers on the left side of the equals sign to make the equation true.

1 2 3 4 5 6 7 8 9 = 100

Answer: 1 _ 2 _ 3 _ 4 _ 5 _ 6 _ 7 _ 8 _ 9 =100

 

6. Timothy is riding a bicycle on a road that can be thought of as having four equal parts. On the first fourth, which is level, he pedals at 10 kilometers per hour. On the second fourth, which is on an upslope, he pedals 5 kilometers per hour. On the third fourth, a downward slope, he goes 30 kilometers per hour. On the final fourth, which is level again but with a tailwind, he goes 15 kilometers per hour. What is Timothy's average speed?

Answer:__________