In this cartoonish illustration, various spacecraft are shown with notations such as circles and pi formulas. Text reads, NASA Pi Day Challenge Answers


The answers to the 2023 NASA Pi Day Challenge are here!



Target Audience:

K-12 students and educators, parents, museums, science centers and planetariums


Update: March 15, 2023 – The answers are here! Visit the NASA Pi Day Challenge page to view the illustrated answer keys for each problem.

NASA is joining schools, students and science centers across the U.S. to celebrate one of the most well known and beloved numbers: pi. Used throughout the STEM world – especially for space exploration! – pi is the number that results from dividing the circumference of any circle by its diameter. Pi can be and often is rounded to 3.14 (even though its decimals never end), which is why 3/14 has been designated National Pi Day.

Pi Day gives us a reason to celebrate the mathematical wonder that helps NASA explore the universe. And we're giving students a chance to join in the fun by using pi to explore Earth and space themselves in our 10th annual NASA Pi Day Challenge.

Plus, explore our collection of evergreen Pi Day Challenge problems, articles about how we use pi at NASA, and free downloads, including mobile phone and desktop backgrounds.

Pi Day Challenge Resources


Multimedia & Downloads

Join the Conversation

Recursos en español