POLYMATH MARCH'14

How is Pi number defined?

• The ratio of the diameter of a circle to its circumference

• The ratio of the circumference of a circle to its radius

• The ratio of the radius of a circle to its circumference

• The ratio of the circumference of a circle to its diameter

Pi is best described as what type of number?

• an irregular fraction

• an integer

• a rational number

• an irrational number

Pi rounded to 9 decimals is:

• 3.141952654

• 3.142952654

• 3.142592654

• 3.141592654

Which of these fractions is closest to Pi?

• 5 over 3

• 21 over 8

• 22 over 7

• 45 over 16

Pi is named after a letter of which alphabet?

• Latin

• Greek

• Cyrillic

• Korean

If you multiply Pi by the square of the radius of a circle, what do you get?

• The circle's area

• The circle's diameter

• The circle's circumference

• The circle's radius

True or false: there is a 'math day'?

• true

• false

What famous scientist was born on Pi Day in 1879?

• Archimedes

• Einstein

• Galieo

• Newton

What is the symbol for pi?

• ∮

• p̂

• π

• ∐

What is pi used to find?

• the perimeter of a square

• the area of a rectangle

• radius of a circle

• circumference of a circle