Mathematics Behind Pi
History of Pi
General Knowledge
Individuals Associated With Pi
Fun Facts
100

How many digits are in pi?


infinite

100

Pi Day is celebrated on March 14.  (which was chosen because it resembles 3.14)  What time does the official celebration begin?

1:59 PM

100

What letter is pi of the Greek alphabet?

16

100

Who discovered the number pi?

Archimedes

100

On The Simpsons, what type of pie lures Homer into a rope trap?

Floor Pie

200

True or False? Pi has been memorized to more than 120,000 digits.

False

200

What year was the first Pi day celebrated?

1988

200

What is the "formal" definition of pi?

The ratio of a circle's circumference to its diameter

200

What famous scientist was born on Pi Day in 1879?

Einstein

200

What portion of Americans admit to having eaten an entire pie by themselves?

1 in 5

300

What type of number is pi described as?

An irrational number

300

What does the Massachusetts Institute of Technology do on Pi Day?

Mails its acceptance letters

300

Among the digits of π currently known, the concentration of each of the digits 0-9 are pretty close to equal. However, in the first 30 places of pi's decimal expansion, which digit is completely missing?

0

300

Who adopted "π" as the symbol for pi?

Euler

300

Can the exact value of pi ever be calculated?

No

400

What are the first 8 digits of Pi?

3.1415926

400

The symbol for pi was introduced in the last _____ years.

300

400

Which number appears most in the first 6 billion decimal places of Pi?

1

400

Who was the first group to find a value for Pi?

Babylonians

400

Approximately how long would it take to recite the value of Pi?

133 years of non-stop recitation

500

If you multiply Pi by the square of the radius of a circle, what do you get?

The circle's area

500

How many hours did it take a supercomputer to calculate pi to 51.5 billion digits, in 1997?

29

500

People tried for centuries to "square the circle". What were they trying to do?

Construct a square of equal area to a given circle

500

Who, in 1706, first gave the Greek letter "π" its current mathematical definition?

William Jones

500

How long did it take a computer in 1949 to compute 2037 digits of pi?

70 hours

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