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

Home > Numbers
A number well defined (Posted on 2018-10-25) Difficulty: 3 of 5
Half of my 2-digit number N is also a 2-digit number,
one of its digit being the sum of N's digit, the other their difference.
All 4 digits are different.

Find my number.

No Solution Yet Submitted by Ady TZIDON    
No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts Too much information | Comment 3 of 5 |
By the way, I notice that the algebraic approach demonstrates that there is only one solution.  But that approach never took advantage of all 4 digits being different.  Therefore, the fact that all 4 digits are different is not needed to solve the problem.
  Posted by Steve Herman on 2018-10-25 09:45:15
Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2019 by Animus Pactum Consulting. All rights reserved. Privacy Information