1. Why is Pi Day celebrated on March 14th?
A) It’s Albert Einstein’s birthday
B) The digits 3/14 match the first three digits of pi
C) Pi was discovered on this day
D) It’s the International Day of Mathematics
Answer: B) The digits 3/14 match the first three digits of pi
2. What is the approximate value of pi (π)?
A) 3.121
B) 3.14159
C) 3.4159
D) 3.11235
Answer: B) 3.14159
3. What does pi (π) represent?
A) The ratio of a circle’s circumference to its diameter
B) The area of a circle
C) The length of a chord in a circle
D) The sum of a circle’s angles
Answer: A) The ratio of a circle’s circumference to its diameter
4. Pi is an example of what type of number?
A) Whole number
B) Rational number
C) Irrational number
D) Prime number
Answer: C) Irrational number
5. Who was the first person to calculate pi approximately?
A) Isaac Newton
B) Archimedes
C) Albert Einstein
D) Euclid
Answer: B) Archimedes
6. What is the symbol for pi (π) derived from?
A) The Greek alphabet
B) The Latin alphabet
C) The Egyptian number system
D) The Roman numeral system
Answer: A) The Greek alphabet
7. What is the Guinness World Record for most digits of pi memorized?
A) 10,000 digits
B) 31,415 digits
C) 50,000 digits
D) Over 100,000 digits
Answer: D) Over 100,000 digits
8. Which famous scientist was born on Pi Day?
A) Galileo Galilei
B) Stephen Hawking
C) Albert Einstein
D) Nikola Tesla
Answer: C) Albert Einstein
9. Pi is commonly used in which field of study?
A) Medicine
B) Astronomy
C) Geography
D) History
Answer: B) Astronomy
10. What fraction is often used as an approximation for pi?
A) 2/3
B) 22/7
C) 7/22
D) 3/5
Answer: B) 22/7
11. Pi has been calculated to how many decimal places using computers?
A) 10,000
B) 1 million
C) 1 billion
D) Over 100 trillion
Answer: D) Over 100 trillion
12. Pi is important in which type of geometry?
A) Euclidean Geometry
B) Spherical Geometry
C) Non-Euclidean Geometry
D) All of the above
Answer: D) All of the above
13. The earliest written approximations of pi come from which civilization?
A) Babylonians
B) Greeks
C) Romans
D) Chinese
Answer: A) Babylonians
14. The first 10 digits of pi are?
A) 3.141592653
B) 3.141526589
C) 3.141529635
D) 3.145926543
Answer: A) 3.141592653
15. What happens if you divide a circle’s circumference by its diameter?
A) You get pi
B) You get 1
C) You get its radius
D) You get its area
Answer: A) You get pi
16. In which century was the pi symbol (π) first used?
A) 14th century
B) 16th century
C) 18th century
D) 20th century
Answer: C) 18th century
17. What is the term for a number that never repeats and never ends, like pi?
A) Rational number
B) Prime number
C) Transcendental number
D) Whole number
Answer: C) Transcendental number
18. Which mathematical operation can you NOT do exactly with pi?
A) Square it
B) Multiply it
C) Divide it
D) Express it as a fraction
Answer: D) Express it as a fraction
19. What is an informal way people celebrate Pi Day?
A) Eating pie
B) Running 3.14 miles
C) Reciting digits of pi
D) All of the above
Answer: D) All of the above
20. If a circle has a diameter of 10 cm, what is its approximate circumference using pi (π = 3.14)?
A) 20 cm
B) 31.4 cm
C) 15.7 cm
D) 25 cm
Answer: B) 31.4 cm