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.

 


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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.

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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

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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!

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