Today is the day: 3.14 aka Pi Day! But we are celebrating all week long... 

We've talked about What Pi Is, and have seen some Pi Day Contests you could enter or create. Now for more Pi Day activities. Here are a few links to lists of Pi Day activities:

​Yesterday, We covered What Is Pi?  Now to do something with it.

Pi Day is this week, so let's celebrate with a weeklong series on the famous number.

It's the Amazing Math Trick!

Some friends were over for pizza the other day, and one of the kids (an eighth grader) said she wanted to show me a math trick. I said sure, and so she asked me to pick any number. I mentally chose my favorite number, but then she could somehow tell that I had made an unusual choice. So, she told me to pick a whole number. I accepted her new constraint and said I had picked a new number. Again she was still suspicious, so she insisted that I pick a positive whole number. Deflated, I chose accordingly and followed along as she had me:

1. double it,
2. add 6,
3. divide by 2, and then
4. subtract the original number