International Pi Day Quiz

Is Pi ( Π ) a rational or irrational number?

• Both

• Irrational

• Rational

• Neither

What is the only number that has the same numbers of letters as it's meaning?

• One

• Three

• Six

• Four

How many prime numbers between 0 and 20?

• One

• Seven

• Eight

• Siz

What number do you get when you multiply all of the numbers on a telephone keypad?

• 362,880

• 3,628,800

• 0

• 9

What is the surface area of a sphere with a radius of 9 inches, using the formula A = 4πr²?

• 324π square inches

• 36π square inches

• 72π square inches

A palindrome is a word, number, phrase of sequence that reads the same backward as forward.

Example: 1237 and 7231 are palimages.

Which of the number below is palimages of 3562951413?

• 3141592653

• 3141295652

• 3141925653

What is the mathematical constant π (pi) approximately equal to?

• 3.14

• 2.71

• 1.62

What is the numerical value of π (pi) to three decimal places?

• 3.144

• 3.142

• 3.143

If the diameter (d) of a circle is 12 cm, what is the circumference of the circle using π as 3.14?

• 75.36 cm

• 37.68 cm²

• 37.68 cm

What is the area of a circle with radius 5 cm, using the approximation π ≈ 3.14?

• 78.55cm²

• 78.5cm²

• 78.5cm