# Category Archives: Math Minute

# # 39: Hexaflexagons

### Learn how to make a really fun geometric toy—a Hexaflexagon

There are many types of flexagons. The names of flexagons tell the type of polygon and the number of faces. Hexaflexagons are paper polygons you will create in this math minute. They were first discovered in 1939 by Arthur Stone, who set up a Flexagon Committee to investigate their properties.

Watch this Vi Hart video and print off thes PDF instructions to help you.

Snap a picture of your finished project and send it to the EY coordinator in your building.

Info from http://www.auntannie.com/Geometric/HexaHexaFlexagon/

# #38: Duplicator Lab Riddles

###### This Math Minute is brought to you by Steve Wyborney. Steve is an award-winning teacher and instructional coach from Oregon. Check out his blog at http://www.stevewyborney.com/

For this Math Minute, complete the following steps…

**Step 1: ** Click here to watch the Duplicator Lab Riddle

**Step 2: ** Answer 1, 2, and/or 3 riddles posed at the end of the video.

**Step 3: ** Give your answers to the EY Coordinator at your school.

Robot image taken from: https://pixabay.com/en/robot-machine-technology-science-312566/

# #37: What’s so special about that number?

###### Why is 2 important? It’s the only even prime number!

###### What’s so special about 1323? It’s an Achilles number!

###### What about 1975? Well it’s the year I was born! 😉

For this Math Minute post, explore:

http://www2.stetson.edu/~efriedma/numbers.html

and find out why different numbers are special. If you’re like me, you’ll only understand a few of them. For the ones you don’t understand, click on the link or do a Google search. Many of the links on the site take you to Wolfram Alpha which is a great resource, but I sometimes like to watch videos to explain things. For example, the link for the number 5 takes you to a page where you can read about the Platonic Solids, but when I searched it on Google, I found this video (https://youtu.be/gVzu1_12FUc) which explained things a little further.

What special number(s) did you discover? Post a comment below.

# #36: Minimum Wage

image taken from https://upload.wikimedia.org/wikipedia/commons/8/8a/US_minimum_wage_comparison_by_state.svg

My boys and I recently had a conversation about minimum wage and it got me thinking about my first job. It was the late 1980’s and I was 13 years old. I worked at Bishop’s Buffet rolling silverware in napkins and I made a whopping $2.15 an hour!

###### Here are some ways to spend some Math Minutes…

- Ask a parent, grandparent, or other adult what their first job was and how much they made per hour. Post a comment using your first name only, grade, and school (i.e. Trevor, 6, Sunset)
- Look at this site and make a table of Nebraska’s minimum wage from 1968 to present.
Turn your data into a graph.**BONUS:** - Using the same site in #2, compare the minimum wage for 2-3 states. Use this online graphing tool or another graphing tool of your choice.
- Read about Nebraska’s minimum wage at: https://www.minimum-wage.org/nebraska What kinds of jobs offer minimum wage? Is $9.00 an hour sufficient? Leave your comments below.

# #35: The Math Behind the Solar Eclipse

image taken from https://commons.wikimedia.org/wiki/File:20th_March_2015_total_solar_eclipse_cropped.jpg

**Taken from NASA.gov: **One of the reasons that ancient peoples could not predict total solar eclipses was because they did not appreciate the mathematics involved in forecasting. Also, many of the parameters needed to accurately predict eclipses had not been astronomically measured until the first century CE. If you are taking a trip to visit Grandma in another town and want to predict at what time you will arrive, it really helps to know how, many road miles you will be traveling and how fast you will go!

Below you will find links to 3 math challenges that will take you through some of the basic mathematics related to the August 21, 2017 eclipse. Complete the challenges and submit them to the EY Coordinator at your building. You may also post a comment about something new you learned.

**Challenge 1** – Working with Geographic Coordinates

**Challenge 2** – X Marks the Spot

**Challenge 8** – Exploring Angular Diameter

# #34 Math Minute: Pizza Math

**Where is your favorite place to eat pizza? My Top 3 are Sortinos, Mama’s Pizza, and Papa Johns. Of course whenever we eat pizza as a family, we have to make up some math problems! Explore some “pizza math” by completing the activities below. **

**Where is your favorite place to eat pizza? My Top 3 are Sortinos, Mama’s Pizza, and Papa Johns. Of course whenever we eat pizza as a family, we have to make up some math problems! Explore some “pizza math” by completing the activities below.**

**How can you spend your Math Minutes?**

- Calculate the area, circumference, and price per square inch of the next pizza you order. Make a display of the math/calculations. Compare it to a pizza from another location.
- Watch the videos at:
- Play Tony Fraction’s Pizza Shop at: http://mrnussbaum.com/tonyfraction/
- Read about how to cut a better slice of pizza with math at:
- Play Pizza Fractions at: http://math.rice.edu/~lanius/fractions/

###### Have a yummy time exploring pizza math!

# #33 Math Minute: March Madness

image from http://www.pdclipart.org/displayimage.php?album=search&cat=0&pos=0

**How does your NCAA bracket look? Did you have a strategy for picking your teams? As we approach the championship game on April 3, let’s take a look at some…**

**“Math Behind March Madness!”**

*How can you spend your Math Minutes?*

Below you will find and activity and some articles about the math behind March Madness. Complete the activity and/or read an article. Post a comment about something new you learned or how your bracket ended up.

- Yummy Math Activity: Does Seeding Matter?
- http://www.ncaa.com/news/basketball-men/bracket-beat/2016-03-13/march-madness-5-bracket-tips-davidson-math-professor
- https://www.nytimes.com/2015/03/22/opinion/sunday/making-march-madness-easy.html?_r=0
- http://www.popularmechanics.com/culture/a25528/the-math-that-will-win-your-march-madness-pool/

# #32 Math Minute: Narcissistic Numbers

According to Wikipedia, a narcissistic number is…

##### In recreational number theory, a narcissistic number (also known as a pluperfect digital invariant (PPDI), an Armstrong number (after Michael F. Armstrong) or a plus perfect number) is a number that is the sum of its own digits each raised to the power of the number of digits.HUH?!

image source Wikimedia Commonshttps://goo.gl/images/TW1Lt2

**Narcissistic Numbers aren’t actually that confusing if you know how to do a couple things. Here’s how you can spend your Math Minutes so that you can learn more about these peculiar numbers!**

- Watch this video by Numberphile: https://youtu.be/4aMtJ-V26Z4
- Look at the list of Narcissistic Numbers on Wolfram Alpha: http://mathworld.wolfram.com/NarcissisticNumber.html
- Pick a Narcissistic Number to “work out” on paper to prove it works. See example below.

# #31 Math Minute: Super Bowl Math

image source: https://pixabay.com/photo-311817/

**Super Bowl LI** happened on Sunday, February 5. Whether you’re a football fan or not, it’s interesting to look at the event’s history. This Math Minute post has you predicting, collecting, and displaying some data related to the Super Bowl.

**Super Bowl LI**

**How can you spend your Math Minutes?**

- Make some predictions. Without looking online for the answers, predict how much a 30 second ad cost to run during the Super Bowl in the following years: 1967, 1977, 1987, 1997, 2007, 2017. Record these predictions on a sheet of paper. Next to your predictions, use this site to record the actual cost for those years.
- Create a pictograph. Pick 5 NFL teams and write those on the x-axis of your graph. Using this site, record how many Super Bowls each team played in. Use a helmet, a football, or some other picture to display the data. Make sure to include a key for your graph (i.e. 1 football = 1 Super Bowl). Give your completed graph to the EY coordinator at your building and we may showcase it on the EY blog!
- Create a scatter plot of the data on this site. Use the x-axis to represent the year and the y-axis to represent the cost of a 30 second ad. There are several tools you can use to make your graph including Numbers (app on the iPad), Create A Graph website, Scatter Plot Tool, and others. Share your completed graph with the EY Coordinator at your building.
- Choose any other data related to the Super Bowl to analyze. Some ideas include ages of players, points scored, salaries of players, etc. This article talks about the data, analytics, and probabilities associated with the Super Bowl.