Q 01/05

Which British single-board computer put its 3 Model B+ on sale on Pi Day 2018?

A) Banana Pi

B) Orange Pi

C) Raspberry Pi

D) Arduino

Answer · why

C) Raspberry Pi

Raspberry Pi began as a cheap board meant to get schoolchildren programming, and its $35 3 Model B+ went on sale on March 14, 2018.

Q 02/05

Using pi, the volume of a cylinder with radius z and height a spells out which food?

A) Pasta

B) Pizza

C) Pita

D) Pie

Answer · why

B) Pizza

Pizza: a cylinder's volume is pi times the radius squared times the height, so a radius of z and a height of a give pi·z·z·a, a well-worn maths joke.

Q 03/05

Pi is the ratio of a circle's circumference to its what?

A) Perimeter

B) Radius

C) Area

D) Diameter

Answer · why

D) Diameter

Diameter is the key: wrap a string once around any round object, cut it into lengths that span the middle, and you get three pieces plus a small lefto...

Q 04/05

Which Greek letter is used to represent the mathematical constant pi?

A) θ

B) σ

C) π

D) φ

Answer · why

C) π

Welsh mathematician William Jones was the first to use the letter alone for the constant, in a 1706 textbook.

Q 05/05

What type of number is pi?

A) Negative

B) Rational

C) Whole number

D) Irrational

Answer · why

D) Irrational

Irrational means no fraction ever equals pi exactly, so its decimals never end or fall into a repeating loop, and record hunters can keep computing fr...