The Pi Trivia Game
part of Pi Land

Finally this is your chance to pay tribute to the magnificent transcendental number that we have all grown to love! Test your knowledge of history, mathematics, and even a little physics.

Here are 25 (given to you 5 at a time) fun pi-related questions, picked randomly from my exciting pi question database! Get ready for the thrill of your lifetime, the ultimate challenge, The Pi Trivia Game!

Pi Flower
1. Simon Plouffe has recently derived an algorithm for calculating pi in hexadecimal. Remarkably, this formula allows one to calculate the nth decimal of pi without calculating the previous digits. Incidentally, Plouffe was listed in the 1975 Guinness Book of World Records. For which of the following accomplishments was he listed?
calculating 3 trillion digits of pi with a Cray supercomputer
walking 1002 miles with a jar of pickles balanced on his head
reciting 4096 digits of pi from memory
baking the world's largest pie, so perfectly round that its circumference divided by its diameter gave pi to an accuracy of over 300 decimal places
world chess champion

2. If you pick any two integers at random, what is that probability that they will be relatively prime? ("relatively prime" means that the two numbers share no divisors except 1)
pi/2
pi/3
1/pi
6/(pi^2)
pi^2/9

3. How does one convert pi in base 10 to base 2?
Keep only the '0' and the '1' in the decimal expansion.
It is impossible because pi > 2.
Replace each digit of pi in base 10 with a 0 if it is divisible by 2 and with and 1 if it is not.
Successively multiply pi by 2 and put a '1' when it is greater than 1 and a '0' when it is smaller than 1. Repeat this step after having kept only the fractional part of the result.
Divide pi in base 10 by 5.

4. In what year were the first 100 digits of pi first calculated?
48 BC
1947
1492
1701
1812

5. What is the formal definition of pi?
the ratio of a circle's circumference to its diameter
3.14159
the radius of a unit circle
the surface area of a sphere of diameter 22/7
a delicious dessert, especially if it contains cherries

eve@eveandersson.com