All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Just Math
15 letter 'words' (Posted on 2018-01-11) Difficulty: 4 of 5
An alphabet with two letters A and B has rules for creating words:

1. Any A must be part of a string containing an even number of A's.
2. Any B must be part of a string of containing an odd number of B's.

For example two six letter words could be BBBAAB and AAAAAA but ABABBB would not be valid.

How many valid 15 letter words are there?

No Solution Yet Submitted by Jer    
No Rating

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Solution2 algorithms same answer--computer assisted (spoiler)Charlie2018-01-11 16:21:19
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (6)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2018 by Animus Pactum Consulting. All rights reserved. Privacy Information