Vampire Numbers and Math

The video explores the concept of vampire numbers, a type of number that can be expressed as the product of two numbers (fangs) using all the original digits. Examples include numbers with two, three, and prime fangs. The video also discusses rules for vampire numbers, such as avoiding trailing zeroes, and connects the concept to folklore, specifically arithmomania. The video concludes with a creative example using Roman numerals.

What is a vampire number?

• A number that is a prime number.

• A number that can be split into two numbers with the same digits.

• A number that is divisible by 2.

• A number that is a perfect square.

Which of the following is an example of a vampire number?

• 1234

• 91011

• 1260

• 5678

What is unique about the vampire number 125,460?

• It has only one pair of fangs.

• It can be split into two different pairs of fangs.

• It is a prime number.

• It has trailing zeroes.

What is a prime vampire number?

• A vampire number with even digits.

• A vampire number with prime fangs.

• A vampire number with multiple fangs.

• A vampire number with trailing zeroes.

Why are trailing zeroes not allowed in vampire numbers?

• They make the number a prime.

• They are not aesthetically pleasing.

• They create extra numbers that don't fit the category.

• They make the number too large.

What is arithmomania?

• A type of vampire.

• A love for mathematics.

• A fear of numbers.

• A compulsion to count.

How can arithmomania be used to avoid vampires in folklore?

• By hiding numbers.

• By reciting numbers.

• By solving math problems.

• By counting grains of sand.

Who is a famous fictional character known for arithmomania?

• Dracula

• The Count from Sesame Street

• Frankenstein

• Sherlock Holmes

What is a Caesar vampire number?

• A vampire number with trailing zeroes.

• A vampire number with prime fangs.

• A vampire number with three fangs.

• A vampire number using Roman numerals.

How is the number 8 represented as a Caesar vampire number?

• IV times II

• III times III

• V times I

• II times IV