## Search found 21 matches

- Sat Sep 12, 2020 12:14 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 719
- Replies:
**2** - Views:
**178**

### Re: Problem 719

You'll smack your forehead when you find the missing 10100. Just remember that zeros can be addends.

- Sun Apr 12, 2020 4:07 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 710
- Replies:
**13** - Views:
**1828**

### Problem 710

**Problem 710**(View Problem)

If palindrome elements have more than one digit, can they occupy the center of a tuple, for example, (2,16,2) could be a twopal for 20? What about (4,12,4)? Would that be a twopal? What about (20)?

- Fri Mar 25, 2016 3:45 am
- Forum: News, Suggestions, and FAQ
- Topic: Errors/Warnings/Bugs
- Replies:
**573** - Views:
**152939**

### Re: Errors/Warnings/Bugs

In https://projecteuler.net/problem=550 third line (first bullet line) "less then" should of course be "less than". I wouldn't even mention it, but your site seems fastidious in correcting these minor typos when discovered. Which I really appreciate after reading so many internet articles with every...

- Sun Mar 24, 2013 10:32 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 420
- Replies:
**11** - Views:
**6061**

### Re: Problem 420

These look correct.

The trace of the missing one is 26.

Good luck!

The trace of the missing one is 26.

Good luck!

- Thu Dec 16, 2010 5:57 am
- Forum: Recreational
- Topic: Project Euler type problems for teenagers
- Replies:
**5** - Views:
**4073**

### Re: Project Euler type problems for teenagers

I have worked on interesting problems here over the last few years. Problems are published monthly during the school year. http://www.pims.math.ca/education/math_problems/ http://www.math.ubc.ca/~adler/problems/ excerpt: Brief Description of Problems Site These problems are intended for British Colu...

- Sat May 29, 2010 1:26 am
- Forum: Recreational
- Topic: Short names to separate '4n+1' primes from the '4n-1's?
- Replies:
**3** - Views:
**3032**

### Re: Short names to separate '4n+1' primes from the '4n-1's?

In http://en.wikipedia.org/wiki/List_of_prime_numbers,

it appears that 4n+1 primes are Pythagorean prime and 4n+3 are Gaussian primes.

I have no idea how popular these names are.

it appears that 4n+1 primes are Pythagorean prime and 4n+3 are Gaussian primes.

I have no idea how popular these names are.

- Sun Jan 10, 2010 11:17 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 268
- Replies:
**28** - Views:
**10801**

### Re: Problem 268

Again, I mean no personal disrespect, Diadem. Your viewpoint is at least as valid as (greater than than or equal to) mine. I personally agree more with stijn263/henk263 and TripleM, and joined this great Project with that in mind. I certainly appreciate the more direct approach of coursework and ask...

- Fri Jan 08, 2010 2:47 am
- Forum: News, Suggestions, and FAQ
- Topic: Need more easier problems
- Replies:
**2** - Views:
**1302**

### Re: Need more easier problems

I've being doing these for years now, and still have 80 to go. Once I had less than 20 to go. All with U.S. High School math (1960s vintage) plus self taught via internet and library since retirement. So, I can attest at least half of these are not TOO HARD, or this old man could not have done them....

- Fri Jan 08, 2010 2:30 am
- Forum: News, Suggestions, and FAQ
- Topic: Number of problems and levels
- Replies:
**4** - Views:
**1896**

### Re: Number of problems and levels

When we solve 300 we will be enlightened and recognize the objects in a higher plane of existence?

To the rest it will appear as {} the empty set.

That is my current fantasy, not a proposal!

To the rest it will appear as {} the empty set.

That is my current fantasy, not a proposal!

- Fri Jan 08, 2010 2:22 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 268
- Replies:
**28** - Views:
**10801**

### Re: Problem 268

I would be disappointed, actually, to see Diadem's question answered here. One of the original attractions to Project Euler, for me at least, is at the bottom of the Problems page: NOTE: Please do not contact Project Euler if you are unable to solve a particular problem. If you can't solve it, then ...

- Fri Oct 16, 2009 2:33 am
- Forum: News, Suggestions, and FAQ
- Topic: Spelling error on front page
- Replies:
**3** - Views:
**1487**

### Re: Spelling error on front page

He means the About page. Good catch!

- Sat Feb 28, 2009 7:40 pm
- Forum: Recreational
- Topic: Which is the hardest problem?
- Replies:
**9** - Views:
**14716**

### Re: Which is the hardest problem?

Hardest problem: What is the sum of the solutions to the ten hardest problems?

Please do NOT post the solution!!!

Please do NOT post the solution!!!

- Sat Feb 28, 2009 7:32 pm
- Forum: Programming languages
- Topic: Python libraries for number theory
- Replies:
**3** - Views:
**2888**

### Re: Python libraries for number theory

Do a search for ent.py (ent = elementary number theory), SAGE (free math system that you can download or use on-line, created by Dr. William Stein, who earlier developed ent.py routines.) You can also search for Python cookbook. Kirby Urner wrote some useful routines that can be found on-line. One I...

- Sun Jan 11, 2009 5:30 am
- Forum: Clarifications on Project Euler Problems
- Topic: problem 206
- Replies:
**33** - Views:
**12894**

### Re: Problem 206

Maybe test with squares not square roots, as the latter may not resolve exactly to integers in some instances.

- Fri Nov 07, 2008 9:13 pm
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 023
- Replies:
**56** - Views:
**22115**

### Re: Problem 23 - incorrect info?

My vote is to leave it as is. Its one of the many notes to self I've made to explore after I solve all the other problems, as to why analysis can't (or didn't so far) lower the bound. I am fascinated by what can be brute forced and what can be analyzed, and while working many of Project Euler's puzz...

- Sun Jun 29, 2008 1:33 am
- Forum: News, Suggestions, and FAQ
- Topic: news
- Replies:
**12** - Views:
**3390**

### Re: news

I agree - everyone on the team works hard! :D Congratulations on reaching 200 problems, especially since there are no low-quality ones among them! I have probably cumulatively spent more hours enjoying these than any other endeavor in my life! I also express my appreciation for the summer break. It ...

- Mon Mar 17, 2008 5:28 am
- Forum: Clarifications on Project Euler Problems
- Topic: Problem 184
- Replies:
**62** - Views:
**23728**

### Re: P184: question

I am 55 and have not yet ranked as low as my age. I hope to reach 100% before I am 60! Even though I am currently solving <1 per week. :( I took no math courses past Calculus and Statistics. Taught myself Basic in the 80s and leveraged that into programming and eventually systems support career. Now...

- Sun Jan 13, 2008 12:00 am
- Forum: News, Suggestions, and FAQ
- Topic: my problems list has an error
- Replies:
**13** - Views:
**4080**

### Re: my problems list has an error

Hello again, More analysis I've done on this problem (easier than solving the remaining math puzzles!) 1. ONLY the Difficulty sorts are faulty. 2. Ascending and Descending sorts display exactly the same list, in inverse order. 3. The problems that display in error do so on each of the three filters,...

- Sat Jan 12, 2008 9:09 pm
- Forum: News, Suggestions, and FAQ
- Topic: my problems list has an error
- Replies:
**13** - Views:
**4080**

### Re: my problems list has an error

Dear Euler et al, I think your latest fix still has issues. My Unsolved sorted by ID list is correct, but when I sort by Difficulty I am getting both Solved and Unsolved problems. The correct number of unsolved problems, which for me is 18 :( display, but not the correct problems. Specifically: Unso...

- Sat Jan 05, 2008 7:59 pm
- Forum: News, Suggestions, and FAQ
- Topic: Offline Reading of Problems (PDF)
- Replies:
**17** - Views:
**14900**

### Re: Offline Reading of Problems (PDF)

I second otakucode!

Thanks, hk, euler, and the entire projecteuler team for all the edifying entertainment that Project Euler provides. Best wishes for speedy resolution to your server woes.

Thanks, hk, euler, and the entire projecteuler team for all the edifying entertainment that Project Euler provides. Best wishes for speedy resolution to your server woes.