Pi Trivia Questions and Answers

Pi is one of the most well-known mathematical constants, representing the ratio of a circle's circumference to its diameter. It's been studied for thousands of years and has many fascinating properties.

Test your knowledge of pi with these pi trivia questions and answers to find out how much you know about this day. Don't forget to play this with friends and family members.

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Table of Contents

Pi Trivia Questions

1. What is Pi Day?

2. Who is credited with calculating the first few digits of pi?

3. What is the mathematical symbol for pi?

4. What is the value of pi to two decimal places?

5. What is the value of pi to five decimal places?

6. What is the formula for calculating the circumference of a circle using pi?

7. Who introduced the symbol π to represent pi?

8. What is the record for memorizing the most digits of pi?

9. What is the name of the irrational number that is approximately equal to pi?

10. Who is the first person known to have used the Greek letter π to represent pi?

11. What is the ratio of the circumference of a circle to its diameter?

12. Who calculated the first 100 digits of pi by hand?

13. What is the value of pi to 10 decimal places?

14. What is the area of a circle with a radius of 4 cm, using pi as 3.14?

15. Who wrote a poem called "The Raven" that contains a reference to pi?

16. What is the name of the famous book that features pi in its title and is about a boy who memorizes the digits of pi?

17. Who is the first person known to have used the Greek letter π to represent pi in writing?

18. What is the diameter of a circle with a circumference of 12π?

19. What is the name of the longest pi-related song ever recorded?

20. What is the relationship between the circumference and the diameter of a circle?

21. Who proved that pi is irrational?

22. In September, 1999, the value of Pi was calculated to a record number of decimal places. How many?

23. Pi is named after a letter of which alphabet

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

25. The Greek letter Pi is also used in legal shorthand to represent what

26. What is the name given to the practice of memorizing large strings of pi digits through various mnemonic techniques?

27. In 2010-2011, how many days were needed to calculate the current record of 10 trillion decimal places for pi?

28. Which of these fractions is closest to Pi?

29. Was Albert Einstein was born on a Pi Day

30. Suppose you wanted to measure the size of the known universe with an error no larger than the size of a hydrogen atom. How many decimal places of pi would you need

Pi Trivia Answers

  1. Pi Day is celebrated on March 14th (3/14) to honor the mathematical constant pi, which is approximately equal to 3.14.
  2. Archimedes
  3. π
  4. 3.14
  5. 3.14159
  6. C = 2πr
  7. William Jones
  8. 70,000 digits
  9. Ludolphine number or Leibniz's formula
  10. William Oughtred
  11. Pi (π)
  12. John Machin
  13. 3.141592654
  14. 50.24 cm²
  15. Edgar Allan Poe
  16. Life of Pi by Yann Martel
  17. Welsh mathematician William Jones
  18. 6
  19. Pi" by Hard 'n Phirm
  20. The circumference is equal to pi times the diameter.
  21. Johann Lambert
  22. 206 billion
  23. Greek
  24. The circle's area
  25. Plaintiff
  26. Piphilology (a play on the words “pi” and “philology”)
  27. 371 days
  28. 22 over 7
  29. Yes
  30. 3

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Nick

I am Nick, one of the co-founder and admin of Trivia Plane, a fun website dedicated to trivia quizzes and getting to know you questions. With a lifelong passion for learning new things and connecting with others, we created Trivia Plane in 2023 as a place for people to challenge their knowledge, discover fascinating facts, and bond over lighthearted questions. As the admin, I am committed to making Trivia Plane a positive, welcoming, and entertaining space for trivia buffs and anyone looking to take a break from the seriousness of life with some friendly competition.

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