1.### What is the date celebrated as Pi Day?

Answer:
March 14

2.### What is the numerical value of pi to two decimal places?

Answer:
3.14

3.### Who is credited with the first calculation of pi?

Answer:
Archimedes

4.### What is the symbol for pi?

Answer:
π

5.### In which year was the first official celebration of Pi Day held?

Answer:
1988

6.### What is the circumference of a circle with a diameter of 1 unit in terms of pi?

Answer:
π

7.### Which famous physicist was born on Pi Day?

Answer:
Albert Einstein

8.### What is the formula for the area of a circle in terms of pi?

Answer:
A = πr²

9.### What is the name of the mathematical constant that represents the ratio of a circle's circumference to its diameter?

Answer:
Pi

10.### How many digits of pi were calculated by the computer scientist Timothy Mullican in 2020?

Answer:
50 trillion

11.### What is the value of pi in degrees when converting a full circle?

Answer:
180 degrees

12.### What is the first digit of pi after the decimal point?

Answer:
1

13.### What is the name of the day that celebrates the mathematical constant pi?

Answer:
Pi Day

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

Answer:
3.1415926535

15.### What is the name of the book that features a character named "Pi"?

Answer:
Life of Pi

16.### What is the term for a number that cannot be expressed as a simple fraction, such as pi?

Answer:
Irrational number

17.### What is the value of pi in radians for a full circle?

Answer:
2π

18.### What is the name of the formula that relates the circumference and diameter of a circle?

Answer:
C = πd

19.### How many digits of pi did the mathematician Ludolph van Ceulen memorize?

Answer:
35

20.### What is the approximate value of pi to three decimal places?

Answer:
3.142

21.### What is the name of the mathematical series that can be used to calculate pi?

Answer:
GregoryLeibniz series

22.### What is the name of the event where people recite digits of pi?

Answer:
Pi recitation contest

23.### What is the name of the famous formula that includes pi, e, and 1?

Answer:
Euler's identity

24.### What is the name of the mathematical constant that is the base of natural logarithms?

Answer:
E (Euler's number)

25.### What is the name of the circle constant that is equal to pi times the radius?

Answer:
Circumference

26.### What is the name of the famous mathematician who calculated pi using polygons?

Answer:
Archimedes

27.### What is the value of pi in a circle with a radius of 2?

Answer:
4π

28.### What is the name of the contest where participants try to memorize as many digits of pi as possible?

Answer:
Pi memorization contest

29.### What is the name of the mathematical constant that represents the ratio of the circumference of a circle to its radius?

Answer:
2π

30.### What is the approximate value of pi to 20 decimal places?

Answer:
3.1415926535898

31.### What is the name of the famous mathematician who introduced the symbol π?

Answer:
William Jones

32.### What is the name of the series that converges to pi/4?

Answer:
GregoryLeibniz series

33.### What is the name of the mathematical concept that pi is a part of, which includes irrational and transcendental numbers?

Answer:
Real numbers

34.### What is the value of pi in a circle with a diameter of 10?

Answer:
10π

35.### What is the name of the mathematical constant that is the ratio of the circumference of a circle to its radius?

Answer:
π

36.### What is the approximate value of pi to 30 decimal places?

Answer:
3.1415926535898

37.### What is the name of the famous formula that relates pi to the sine function?

Answer:
The sine integral

38.### What is the value of pi in a circle with a radius of 5?

Answer:
10π

39.### What is the name of the mathematical series that can be used to approximate pi using the arctangent function?

Answer:
Machin's formula

40.### What is the name of the famous mathematician who proved that pi is irrational?

Answer:
Johann Lambert

41.### What is the approximate value of pi to 100 decimal places?

Answer:
3.1415926535... (and continues)

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