Question

What is a vanpire number ?

Answer 1

Solution-: A vampire number is a natural number with an even number of digits, that can be factored into two integers. These two factors are called the fangs, and must have the following properties:

• they each contain half the number of the digits of the original number
• together they consist of exactly the same digits as the original number
• at most one of them has a trailing zero.
• An example of a Vampire number and its fangs: 1260: (21, 60)