## Sellwood MATHCOUNTS Club

Anyone is welcome to join the Math Club at Sellwood! The club is part of the national MATHCOUNTS program for middle school students who would like to solve fun math problems. The club is free: all you have to do is show up on Wednesday mornings at 8:05 in Room 137 (Ms. Wright's room). If we do not see you at the door near the gym, knock on Ms. Wright's window on the north side of school and someone will let you in.

Club members can just solve for fun, or can compete with each other and later against other schools in regional MATHCOUNTS competitions in the spring. Members can compete individually or as part of a team. Competitive team members should come to most club sessions from November on. If there is interest, students can also make math videos and submit them to a MATHCOUNTS contest for prizes. See the MATHCOUNTS website at

Sellwood's math teachers have all agreed to show their support for student participation in Math Club by

Questions? Contact Ms. Wright in Room 137 at Sellwood or by email at jwright

Club members can just solve for fun, or can compete with each other and later against other schools in regional MATHCOUNTS competitions in the spring. Members can compete individually or as part of a team. Competitive team members should come to most club sessions from November on. If there is interest, students can also make math videos and submit them to a MATHCOUNTS contest for prizes. See the MATHCOUNTS website at

**mathcounts.org**for much more information.Sellwood's math teachers have all agreed to show their support for student participation in Math Club by

*considering*excusing one homework assignment per week for students who provide certificates of participation in that week's Math Club. The excused homework is completely at teacher discretion, however, and may depend on the student's current grade, whether the homework assignment is too essential to miss, and any other factors the teacher wishes to consider.Questions? Contact Ms. Wright in Room 137 at Sellwood or by email at jwright

**2**@pps.net.## Fun Math-y Websites

This is nowhere close to a complete list! I will add things as they occur to me or when we use things from them in MATHCOUNTS Club.

Oregonian's Puzzle Kingdom: Lots of logic puzzles of all sorts, including Battleships, Sudoku, Pic-a-Pix, Kakuro, and Hashi.

KenKen: Includes various difficulty levels. Great practice for thinking about numbers (especially factoring) and logic!

Numbrix: another neat logic puzzle. Try the easier levels first to get the hang of it.

Brain Teasers from the National Council of Teachers of Mathematics' Illuminations website

Calculation Nation online math games (also from NCTM)

Hotmath math games are at various levels; pick one that is appropriate for you (the cockroach one is pretty funny)

NRICH Enriching Mathematics: Lower secondary is probably the most appropriate level here

Vi Hart has a lot of amazing videos on YouTube. I haven't watched all of these, and some rely on high school or college math.

Lure of the Labyrinth is a computer game designed for pre-algebra middle schoolers. It has a storyline in which you are rescuing a lost pet from monsters in a labyrinth by solving complicated math puzzles. You can set up a free account to try it. I have not investigated it much yet. If you try it, let me know what you think of it!

Lewis Carroll Puzzles is a site Mr. Sossel recommends. (Off the computer, Ms. Wright also strongly recommends reading Alice in Wonderland and Through the Looking Glass if you have not already!)

I keep a list of math sites I like for sixth grade math at juliewright.weebly.com/math-links.html . A lot of these are practice and the problems aren't complicated, but some are pretty interesting even if you have mastered the topics.

Oregonian's Puzzle Kingdom: Lots of logic puzzles of all sorts, including Battleships, Sudoku, Pic-a-Pix, Kakuro, and Hashi.

KenKen: Includes various difficulty levels. Great practice for thinking about numbers (especially factoring) and logic!

Numbrix: another neat logic puzzle. Try the easier levels first to get the hang of it.

Brain Teasers from the National Council of Teachers of Mathematics' Illuminations website

Calculation Nation online math games (also from NCTM)

Hotmath math games are at various levels; pick one that is appropriate for you (the cockroach one is pretty funny)

NRICH Enriching Mathematics: Lower secondary is probably the most appropriate level here

Vi Hart has a lot of amazing videos on YouTube. I haven't watched all of these, and some rely on high school or college math.

Lure of the Labyrinth is a computer game designed for pre-algebra middle schoolers. It has a storyline in which you are rescuing a lost pet from monsters in a labyrinth by solving complicated math puzzles. You can set up a free account to try it. I have not investigated it much yet. If you try it, let me know what you think of it!

Lewis Carroll Puzzles is a site Mr. Sossel recommends. (Off the computer, Ms. Wright also strongly recommends reading Alice in Wonderland and Through the Looking Glass if you have not already!)

I keep a list of math sites I like for sixth grade math at juliewright.weebly.com/math-links.html . A lot of these are practice and the problems aren't complicated, but some are pretty interesting even if you have mastered the topics.

## Sample MATHCOUNTS Problems

Some are harder than others. Try to solve the ones that are a good match for you now! If you come to Sellwood's MATHCOUNTS club, you will learn how to solve problems like these and some that are even harder.

- If the ratio of the length of a rectangle to its width is 9/4 and its length is 18 cm, what is the width of the rectangle?
- A carnival pass costs $15 and is good for 10 rides. This is a savings of $2.50 compared to paying the individual price for 10 rides. What is the individual cost of a ride without the pass?
- What is the volume, in cubic centimeters, of a cube that has a surface area of 96 square cm?
- At a pet store, there are 23 animals. Among the animals in the store, 15 are white, 5 are white dogs, and 7 animals are neither dogs nor white. How many dogs are at the pet store?
- Five positive integers have a mean of 8. What is the greatest possible value for the median of the five integers?
- The bar charts below show the number of letters in the first names of the girls and boys in Mrs. Rodriguez's class. If one girl and one boy are chosen at random, what is the probability that the chosen students have the same number of letters in their first names? Express your answer as a common fraction.

## Answers to Sample MATHCOUNTS Problems

Answers to questions on MATHCOUNTS flyer: 8 cm ; $1.75 ; 64 cubic cm ; 6 dogs ; 12 ; 1/15.

Come learn how to solve more! It will be FUN.

Come learn how to solve more! It will be FUN.