Ted-Ed The Infinite Life of Pi

What is the ratio of a circle's circumference to its diameter known as?

• Pi

• Euler's number

• Golden ratio

• Square root of 2

For how long has the number pi been known?

• Nearly 1,000 years

• Almost 4,000 years

• About 2,000 years

• Over 5,000 years

Which civilizations had estimates of pi?

• Roman, Mayan, Incan, and Norse

• Ancient Greek, Babylonian, Chinese, and Indian

• Mongolian, Celtic, Persian, and Ottoman

• Egyptian, Sumerian, Aztec, and Phoenician

What kind of number is pi?

• Transcendental number

• Imaginary number

• Irrational number

• Rational number

How many digits of pi had been calculated by the year 1400?

• Up to seven decimal places

• Up to twelve decimal places

• Up to ten decimal places

• Up to five decimal places

What is used to test the speed of computers?

• Calculating Euler's number

• Calculating the square root of 2

• Calculating pi

• Calculating the golden ratio

How many digits of pi have quantum computers calculated up to?

• Two trillion digits

• Two billion digits

• Two million digits

• Two quadrillion digits

For most scientific uses, how many digits of pi are needed?

• The first forty digits

• The first thirty digits

• The first twenty digits

• The first ten digits

In what field is pi used to calculate the area under a normal distribution curve?

• Calculus

• Algebra

• Statistics

• Geometry

What does pi help to understand in music?

• Melody

• Periodic systems

• Rhythm

• Harmony