Find vampire numbers - MATLAB Cody - MATLAB Central

Problem 1826. Find vampire numbers

Difficulty:
(176)
Rate
A vampire number is a number v that is the product of two numbers x and y such that the following conditions are satisfied:
  1. at most one of x and y are divisible by 10;
  2. x and y have the same number of digits; and
  3. The digits in v consist of the digits of x and y (including anyrepetitions).
If these conditions are met, x and y are known as "fangs" of v. For example, 1260 is a vampire number because 1260 = 21*60, so 21 and 60 are the fangs.
Write a function that returns all the vampire numbers in a given array. The output is a vector.
Example: disp(find_vampire(1000:2000) 1260 1395 1435 1530 1827
Solve

Solution Stats

24.92% Correct | 75.08% Incorrect
Last Solution submitted on May 08, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers351

Suggested Problems

More from this Author9

Problem Tags

factors number theory

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!