Pi Day (2025)

What day is Pi Day?

• March 14

• December 25

• October 31

• January 1

What famous scientist was born on Pi Day in 1879?

• Archimedes
• Einstein
• Galileo
• Newton

What U.S. city has a zip code containing the first 5 digits of pi?

• Savannah, Georgia
• Salt Lake City, Utah
• Frankfort, Kentucky
• Juneau, Alaska

What does this symbol represent?

• a letter from the English alphabet
• a greek letter
• pie
• pi

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

What is/are the formula(s) to find the area of a circle?

• πr²
• 2πr
• √π

What is the blue colored part of this circle called?

• Circumference

• Diameter

• Radius

• Area

What is the "formal" definition of pi?

• 22/7
• 3.1415926
• the ratio of a circle's circumference to its diameter
• the surface area of a sphere of diameter 22/7

How many digits are in pi?

• 10 trillion
• 5 billion 
• infinite 
• a lot 

What are the first six digits of pi?

• 314157

• 3141592

• 31415

• 314159