All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info
Home > Numbers > Sequences
These problems deal with sequences of numbers. Can you spot what the sequences' rules are?
Difficulty: 4 of 5 Latest: Optimal Order

Consider Erase the right 90

Find a sequence of the numbers from 1 to 100, not necessarily in that order, such that exactly ten groups of 10 form exactly ten distinct subsequences, which need not be continuous, in each of strictly increasing and strictly decreasing order.

List the 20 subsequences.

(No Solution Yet, 1 Comments) Submitted on 2016-02-10 by broll   
Page 1 of 21   next >>    
Difficulty: 3 of 5Mille and Remainder Resolution |
Posted on 2016-02-01 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Last term zero |
Posted on 2016-01-28 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Find the next two numbers |
Posted on 2016-01-21 by Ady TZIDON (Solution Posted, 4 Comments)
Difficulty: 2 of 5Two related sequences |
Posted on 2015-12-30 by Jer (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Some sequences! |
Posted on 2015-12-18 by Ady TZIDON (Solution Posted, 1 Comments)
Difficulty: 3 of 5Who's next |
Posted on 2015-12-15 by Ady TZIDON (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Fibonaccish ratio | Rating: 3.00
Posted on 2015-12-07 by Jer (No Solution Yet, 3 Comments)
Difficulty: 2 of 5No primes here | Rating: 5.00
Posted on 2015-11-30 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Summing Consecutive Terms and Pair Determination |
Posted on 2015-11-21 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Generalizing II | Rating: 4.00
Posted on 2015-11-20 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 4 of 59-letter word II |
Posted on 2015-11-13 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5An interesting matrix |
Posted on 2015-11-05 by Jer (No Solution Yet, 3 Comments)
Difficulty: 3 of 5Term Sum Settlement | Rating: 3.00
Posted on 2015-10-29 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Tacit series |
Posted on 2015-10-23 by Ady TZIDON (Solution Posted, 2 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 - 2016 by Animus Pactum Consulting. All rights reserved. Privacy Information