Hint  Answer  % Correct 

First five digits?  3.1415  86%

It is an {irrational} number.  86%
 
What day is Pi day?  March 14  86%

It is a ratio of a circle's  {circumference}  71%

Which Nobel laureate was born on that day?  Albert Einstein  71%

It is a letter of the {Greek} alphabet.  71%
 
to its {diameter}  57%
 
It is also called the  {Archimedes} or {circular} constant  0%

Which mathematician calculated the first 707 digits of pi in the 19th century?  William Shanks  0%
