Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#351 2010-05-04 21:45:34
- Tigeree
- Member
- Registered: 2005-11-19
- Posts: 13,883
Re: Add 13 more and post it forever.
Wow.
4563
People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.
Offline
#352 2010-05-04 21:55:25
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
4576
(-4+5)*(7+6) = 13
Last edited by phrontister (2010-05-04 21:59:27)
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#353 2010-05-04 22:07:23
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
Hi phrontister;
Your 4563 was the best one yet. Sorry you deleted it. Really clever!
4589
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#354 2010-05-04 22:11:31
- Tigeree
- Member
- Registered: 2005-11-19
- Posts: 13,883
Re: Add 13 more and post it forever.
nice.
4602
People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.
Offline
#355 2010-05-04 22:19:50
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
Your 4563 was the best one yet. Sorry you deleted it.
Tigeree beat me to the punch (Hi, Tigeree! 
), but this next one's basically the same.
Last edited by phrontister (2010-05-04 22:23:16)
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#356 2010-05-04 22:21:49
- Tigeree
- Member
- Registered: 2005-11-19
- Posts: 13,883
Re: Add 13 more and post it forever.
what's with all the squareroots these days? Sheesh.
4628
People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.
Offline
#357 2010-05-04 22:24:43
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
'k. But I thought you'd like mine, 'cos I thought it was pretty! 
4641
4+6+4-1 = 13
I checked your two biggies, Bobby, and (would you believe) they're both right. Just thought I'd let you know.
Btw, how did you work them out?
Last edited by phrontister (2010-05-04 22:36:46)
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#358 2010-05-04 22:38:26
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
4654
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#359 2010-05-04 22:53:37
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#360 2010-05-04 23:09:28
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
18^2 + 66^2 = 42^2 + 54^2 =4680
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#361 2010-05-04 23:58:16
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
Aaah...worked it out. Nice one, Bobby!
Last edited by phrontister (2010-05-06 00:37:22)
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#362 2010-05-05 00:04:33
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
4706
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#363 2010-05-05 00:23:50
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
Hi Bobby,
Since posting those long lines in our posts my browser's right-hand margin has widened to way beyond the edge...both in IE & Firefox. For you too?
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#364 2010-05-05 00:24:43
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
4732
Yes, for me too.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#365 2010-05-05 00:33:12
- Tigeree
- Member
- Registered: 2005-11-19
- Posts: 13,883
Re: Add 13 more and post it forever.
And me! I hate it when this happens!
4745
People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.
Offline
#366 2010-05-05 00:34:39
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
Pages 14 & 15 have that problem, but not p13. P16 will probably be ok.
Last edited by phrontister (2010-05-05 00:44:46)
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#367 2010-05-05 00:37:28
- Tigeree
- Member
- Registered: 2005-11-19
- Posts: 13,883
Re: Add 13 more and post it forever.
If the equation is long vertically rather than horizontally.
4758
People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.
Offline
#368 2010-05-05 00:40:25
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
4771 appears at:
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#369 2010-05-05 00:49:53
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
4784
4!-7-8+4 = 13
4797
4+7+9-7 = 13
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#370 2010-05-05 01:45:37
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
4810
4810 = 7^2 + 69^2 = 29^2 + 63^2 = 33^2 + 61^2
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#371 2010-05-05 03:28:22
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
Hi Bobby,
I factorized the long number in my post #361 so that it now isn't too hopelessly long for the page. I tried it with yours, and although my factorizing program is still busily working at it, it looks like it may only reduce to 3 small factors (2^8, 13^2 & 38993^2), plus one huge one.
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#372 2010-05-05 06:44:53
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
Hi phrontister;
That was a 200 digit number! Be careful, although all programs provide a factor integer command, this is extremely misleading.
Factoring is a difficult problem. After say 50 - 70 digits or so it could take a very long time.
For a 200 digit number it could take billions of years. We do not even know whether a fast way to factor exists.
4836
Where C is the Catalan constant.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#373 2010-05-05 13:18:51
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
Hi Bobby,
My factorization program's progress bar virtually didn't move - if at all - overnight and I turned it off this morning. Now I'll never know how many billions of years it would have taken to complete the task!
Last edited by phrontister (2010-05-05 13:24:27)
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline
#374 2010-05-05 14:38:02
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Add 13 more and post it forever.
4862
The string 4,8,6,2 occurs at:
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#375 2010-05-05 22:46:37
- phrontister
- Real Member
- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,877
Re: Add 13 more and post it forever.
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson
Offline