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

Home > Just Math
Divisibility rule (Posted on 2013-02-13) Difficulty: 2 of 5
abcde is five digit number. Show that abcde is divisible by 7 if and only if the number abcd-(2*e) is divisible by 7 (* means Multiplication)

No Solution Yet Submitted by Danish Ahmed Khan    
No Rating

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Solutionfull proof - spoilerAdy TZIDON2013-02-13 11:05:20
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 (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

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