Pi Day

March 14th is π Day.

The third month and the 14th day
relates to 3.14 which is π to three
significant figures.

Today's challenge is to memorise π to as many digits as you can before it fades completely.

3.141592653589793238462643383279
502884197169399375105820
974944592307816406286
208998628034825
3421170679
...

Just for fun play the pi memory game. Students could play the game in groups of three and the winners enter the class final! Two students stand back to back and take it in turns to say the next digit of pi. The person who gets furthest wins!

Though it is not necessary for students to memorise pi these days it is important that they are familiar with it and can use a rough approximation of it to estimate answers to questions. This exercise certainly helps students become familiar with pi but also uses pi as an arbitrary subject of this memory challenge.

Incidently, in the days when memorising pi was important people devised mnemonics such as “How I wish I could calculate pi” where the number of letters in each word represent the first seven digits of pi. Do you know any other mnemonics for remembering pi? Please let us know.

 


Share

Topics: Starter | Circles | Memory | Multiple Intelligences | Rounding

  • Karen, Klynnjansen@gmail.com
  •  
  • I absolutely love many of your problems. I search for open-ended ones & your site usually provides a lot of them! Thanks!
    One suggestion I have is to always have one matching a holiday. I really enjoy incorporating the holidays/current events. I see you have a great upcoming one for Valentine's Day. You provided a fun one on Halloween.
    A few that I would like to see added:
    a Mardi Gras week or at least one on Fat Tuesday
    Super Bowl
    100th Day (or related to the number 100, I realize this varies from school to school, but maybe a week's worth of questions geared toward this celebration)
    St. Patrick's Day
    Keep up the excellent problems for our students.
    Greatly appreciated!
    Veterans Day.
  • Transum,
  •  
  • You may have scrolled this far down the page and missed the buttons above that allow you to vary the amount of time pi is visible on the screen. This function adds urgency and excitement to the memorising part of the lesson. You choose the time that would work best for your class. Happy Pi Day!
  • Matthew Zhao, Craigslea State Primary School
  •  
  • Starting from last year, I have memorised pi to 100 digits. I purposely finished memorising 100 digits on March 12th. March 13th was for practice and March 14th was for presentation.
  • Will, Carshalton Boys
  •  
  • Afterwards, I showed the class the world record holders. They loved it. http://pi-world-ranking-list.com/lists/memo/.
  • Transum,
  •  
  • The first time a digit repeats six times in succession in pi is at the 762nd position where you can find six nines in a row. This is known as the Feynman Point.

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.

If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:

Excellent, I would like to see more like this
Good, achieved the results I required
Satisfactory
Didn't really capture the interest of the students
Not for me! I wouldn't use this type of activity.

This starter has scored a mean of 3.1 out of 5 based on 170 votes.


Previous Day | This starter is for 14 March | Next Day

 

Online Maths Shop

Laptops In Lessons

Teacher, do your students have access to computers?
Do they have iPads or Laptops in Lessons?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here a concise URL for a version of this page without the comments.

Transum.org/go/?Start=March14

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=Circles

Circle attributes


 

How does the circumference of a glass compare to the height of the glass? You'll be surprised when you find out.

 


Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon search box and some items chosen and recommended by Transum Mathematics to get you started.

Have you read Craig's book yet?

Craig Barton must surely be the voice of Mathematics teachers in the UK. His wonderful podcasts interviewing the industry experts have culminated in this wonderful book. As Craig says: "I genuinely believe I have never taught mathematics better, and my students have never learned more. I just wish I had known all of this twelve years ago..." more...

"How I wish I'd taught Maths" is an extraordinary and important book. Part guide to research, part memoir, part survival handbook, it’s a wonderfully accessible guide to the latest research on teaching mathematics, presented in a disarmingly honest and readable way. I know of no other book that presents as much usable research evidence on the dos and don’ts of mathematics teaching in such a clear and practical way. No matter how long you have been doing it, if you teach mathematics—from primary school to university—this book is for you." Dylan Wiliam, Emeritus Professor of Educational Assessment, UCL.

The Craig Barton Book

Casio Classwiz Calculator

There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).

As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...

Hello World

You are buying a (driverless) car. One vehicle is programmed to save as many lives as possible in a collision. Another promises to prioritize the lives of its passengers. Which do you choose?

Welcome to the age of the algorithm, the story of a not-too-distant future where machines rule supreme, making important decisions – in healthcare, transport, finance, security, what we watch, where we go even who we send to prison. So how much should we rely on them? What kind of future do we want?

Hannah Fry takes us on a tour of the good, the bad and the downright ugly of the algorithms that surround us. In Hello World she lifts the lid on their inner workings, demonstrates their power, exposes their limitations, and examines whether they really are an improvement on the humans they are replacing.

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...


Parts of a circle 


Pie In The Sky

Pie In The Sky

Must-watch Pi videos

Cartoon Maths

Pi and Four Fingers

Pi and Four Fingers

In this video mathematician Simon Singh talks about Pi and Maths in The Simpsons cartoon.

The short web address is:

Transum.org/go/?to=pi4fingers

Watch and Learn

Facts About Pi

Facts You Should Know About Pi

Mathematician Presh Talwalkar explains five facts you should know about pi.

The short web address is:

Transum.org/go/?to=pifacts

Great Video

A Brief History of Pi

A Brief History of Pi

A video from Simon Clark presenting a deep but accessible account of the history of pi.

The short web address is:

Transum.org/go/?to=pihistoryvideo

Apple

©1997-2018 WWW.TRANSUM.ORG