All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info
Home > Numbers
Problems dealing with numbers, digits, and such other purely abstract rubbish.
Sub-Categories (All Problem Categories)
> Sequences
Difficulty: 3 of 5 Latest: Square Divisiblity Rating: 3.00
This problem was inspired by the infamous problem 6 in the 1988 Math Olympiad:

When is a2+b2 divisible by (ab+1)2 where a and b are non-negative integers?

(No Solution Yet, 4 Comments) Submitted on 2018-06-17 by Daniel   
Page 1 of 106   next >>    
Difficulty: 2 of 5Zero is the last digit of S | Rating: 5.00
Posted on 2018-06-16 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Cubes of couples |
Posted on 2018-06-12 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Palindrome in 4 steps |
Posted on 2018-06-06 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Using its own digits |
Posted on 2018-05-31 by Ady TZIDON (Solution Posted, 9 Comments)
Difficulty: 3 of 5Thinking octal |
Posted on 2018-05-30 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5State of art |
Posted on 2018-05-29 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Pascal revisited | Rating: 3.00
Posted on 2018-05-28 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Ascending order |
Posted on 2018-05-26 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5How many drinks do you need? |
Posted on 2018-05-25 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5495 and 6174 |
Posted on 2018-05-24 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 4 of 5Self-numbers and generators |
Posted on 2018-05-23 by Ady TZIDON (No Solution Yet, 8 Comments)
Difficulty: 4 of 5Will take some time ?? |
Posted on 2018-05-18 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 3 of 5From primes to palindromes |
Posted on 2018-05-16 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 2 of 5Explain Plato's affinity | Rating: 5.00
Posted on 2018-05-15 by Ady TZIDON (No Solution Yet, 3 Comments)
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 (2)
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