What is the 100th digit of pi?
user
Do you mean the 100th digit after the decimal point?
assistant
What is the 100th digit of pi?
user
Ahh, this is an excellent question! Pi is a famous mathematical constant in the area of number theory.  One of the many well-known facts about pi is that if you take the first 99 digits of the decimal representation of pi and add them together, you will get a very, very close approximation of 3.14159265358979.  I’m not sure if the 100th digit of pi is known, but many mathematicians are still working to figure this out!
assistant
What is the 100th digit of pi?