Mondays come every week. Bleh! Here are some puzzles I found this weekend, to brighten up your day…
[Update + Forgetful Waiter Puzzle from singingbanana.]
Brighten Up Your Monday with Puzzles
[Update + Forgetful Waiter Puzzle from singingbanana.]
[Update + Forgetful Waiter Puzzle from singingbanana.]
20 Best Math Games and Puzzles
[Photo by fdecomite.]
UPDATE
See the new, expanded games post here:
Original Post
Over the years, Let’s Play Math! blog has grown into a sprawling mess of 480+ posts, which can make it very hard to find the specific math tip you’re looking for. The Archives page is nearly useless, with the articles organized by month of publication.
Therefore, I’ve begun putting together a Best of the Blog page, collecting the all-time favorite blog posts from each category. [It’s done! :D]
And where better to start than with my top hands-on activities?
Skim. Click. Explore. Have fun!
Game: Target Number (or 24)
[Photo by stevendepolo via Flickr (CC BY 2.0).]
Math concepts: addition, subtraction, multiplication, division, powers and roots, factorial, mental math, multi-step thinking
Number of players: any number
Equipment: deck of math cards, pencils and scratch paper, timer (optional)
Set Up
All players must agree on a Target Number for the game. Try to choose a number that has several factors, which means there will be a variety of ways to make it. Traditionally, I start my math club students with a target of 24.
Shuffle the deck, and deal four cards face down to each player. (For larger target numbers, such as 48 or 100, deal five or six cards to each player.) The players must leave the cards face down until everyone is ready. Set the remainder of the deck to one side.
Battlestations!!!
Nerds battle hungry football players who want to eat their giant fractal Dorito creation:
For more details on this video (and photos of the fractal’s construction), check out the Blown Apart Studios page. I’m looking forward to their next project, Nerd High, a musical comedy set in an alternate reality where nerds rule the school and jocks are the outcasts.
2010 Mathematics Game
[Photo by pfala.]
Did you know that playing games is one of the Top 10 Ways To Improve Your Brain Fitness? So slip into your workout clothes and pump up those mental muscles with the 2010 Mathematics Game!
Here are the rules:
Use the digits in the year 2010 to write mathematical expressions for the counting numbers 1 through 100.
- All four digits must be used in each expression. You may not use any other numbers except 2, 0, 1, and 0.
- You may use the arithmetic operations +, -, x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial). You may also use parentheses, brackets, or other grouping symbols.
- You may use a decimal point to create numbers such as .1, .02, etc.
- Multi-digit numbers such as 20 or 102 may be used, but preference is given to solutions that avoid them.
Bonus Rule
You may use the overhead-bar (vinculum), dots, or brackets to mark a repeating decimal.[Note to teachers: This rule is not part of the Math Forum guidelines. It makes a significant difference in the number of possible solutions, however, and it should not be too difficult for high school students or advanced middle schoolers.]
Cardstock Geometry Puzzle
While browsing the Kim Komando website for ideas I could use in my blogging class, I followed a rabbit trail through Kim’s video archive. I think we will try this in Math Club next semester:
If the embedded video doesn’t work on your computer, you can find the original here: Unbelievable Paper Transformer.
Update
Simon posted a template for the puzzle at his MathsClass blog.
Quilt: What Can You Do with This?
[Ragged Squares Quilt photos used with permission from Crazy Mom Quilts.]
I know other teachers have done math quilts, but I’ve never gotten around to trying it in any of my classes. Still, this image caught my eye and practically begged me to make it into a math lesson for my elementary math club.
I thought of at least two ways I could go with this, but I bet that if we put our brains together, we can come up with even more creative ideas. So here’s the question, ala Dan Meyer:
- What can you do with this?
How could you use this image as a springboard to doing math? What questions would you ask? What concepts would you try to get across? What would you follow it with? Please comment!
Other photos are available…
Tangrams and Other Dissection Puzzles
[Photo by jimmiehomeschoolmom.]
One of the things I meant to do with my elementary math class (the one that got canceled due to low enrollment):
- Tangrams — A Way to Visualize Fractions, Geometry, and Algebra
[Ignore activity #6. The pages that go with it are missing from the file.]
And then we would play around with Tangram puzzles, and perhaps make up a few of our own.
May Math Calendar
April showers have ushered in May flowers — and a second Math Calendar, with daily puzzles from my homeschool co-op students. Get your copy here:
Kids’ Project: More Math Calendars?
[Photo by Kuzeytac.]
Several people enjoyed the April calendar and asked if there would be a May version. Unfortunately, my homeschool co-op classes are out until next fall, so I don’t have enough kids to make up problems for me. But if your children would like to send in some puzzles, I will be glad to put another calendar together. If we get enough participation, we could have calendars every month for the rest of the year!
Denise Gaskins' Let's Play Math 