Why we celebrate The International π Day on March 14?

• It is after The Math Day

• It symbolize the first digits of π

• Stephen Hawking was born on March 14

• It was the day of discovering the π number

What is another name for the number π?

• Ludolphian

• Almagest

• Aryabhata

• Archimedan

Where is the π roundabout?

• Berlin

• Shanghai

• Toronto

• Warsaw

Who wrote the poem about the number π?

• Wisława Szymborska

• Julian Tuwim

• Olga Tokarczuk

• Sławomir Mrożek

Which fraction is the closest approximation to π?

• 22/7

• 23/7

• 22/8

• 23/8

Which famous scientist was born on March 14?

• Isaac Newton

• Stephen Hawking

• Albert Einstein

• Maria Skłodowska-Curie

The tenth digit after the comma is:

• 5

• 6

• 8

• 9

Who implement the symbol π?

• Ludolph van Ceulen

• William Jones

• Leonhard Euler

• William Oughtred

If the circle has a diameter of 1, then the number π is:

• chord

• area

• radius

• perimeter

Which formula is correct?

• π r - area of ​​a circle with radius r

• π r² - area of ​​a circle with radius r

• π r - perimeter of a circle with radius r

• 4/3 π r² - area of a sphere with radius r