# Pi Trivia Quiz

10 Questions  Settings  Here is a quiz about the most famous number in Maths. Test your knowledge of history! Test your ability to make educated guesses!

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• 1.
Who, in 1706, first gave the Greek letter “pi” its current mathematical definition?
• A.

Albert Einstein

• B.

William Jones

• C.

Attila the Hun

• D.

Archimedes

• E.

Napoleon Bonaparte

• 2.
Pi is transcendental.  What does this mean, in mathematics?
• A.

It is equal to the ratio of two integers

• B.

Its square root is imaginary

• C.

It cannot be expressed as an integer, or as a root or quotient of integers

• D.

It was Ralph Waldo Emerson’s favorite number.

• 3.
What is the earliest known reference to pi in history?
• A.

The Rosetta Stone, approx. 200 BC

• B.

The Bible

• C.

An Egyptian papyrus scroll, written approx. 1650 BC by Ahmes the Scribe

• D.

Euclid’s Elements, written in the 3rd century BC

• 4.
People tried for centuries to “square the circle”.  What were they trying to do?
• A.

Construct a square that perfectly circumscribes (surrounds) a given circle

• B.

Determine the value of pi squared

• C.

Multiply a circle by itself

• D.

Use a straightedge and compass to construct a square exactly equal in area to a given circle

• E.

Alter a recipe intended for a round pan so that it would fit exactly into a square pan

• 5.
Some people became mentally deranged when trying to “square the circle”.  What was this illness named?
• A.

Impossibilius Fittus

• B.

Morbus Cyclometricus

• C.

Repetitionatis Decimalus

• 6.
Are pi’s digits periodic?  In other words, do the digits ever repeat themselves in any pattern?
• A.

Yes. The digits repeat themselves every 6,000,000 decimal places

• B.

No. Every periodic number is rational, but pi is irrational

• C.

Yes. Every infinitely long number repeats itself

• D.

Perhaps. Not enough digits of pi have been calculated to know yet

• 7.
• A.

Its digits cannot be rationed out evenly

• B.

Nobody with sound judgement has anything to do with it

• C.

It is a real number, but can’t be expressed as a ratio of two integers

• 8.
What is the “formal” definition of pi?
• A.

The surface area of a sphere of diameter 22/7

• B.

3.1415926

• C.

• D.

A delicious dessert

• E.

The ratio of a circle’s circumference to its diameter

• 9.
Among the digits of pi currently known, the concentration of each of the digits 0-9 are pretty close to equal.  However, in the first 30 places of pi’s decimal expansion, which digit is completely missing?
• A.

7

• B.

2

• C.

0

• D.

8

• 10.
• A.

2 ∏ feet

• B.

2 ∏ r feet, where r is the radius of the earth

• C.

∏ r ^2 feet