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#81 |
The Blobbit
Join Date: Feb 2004
Location: Kent, England (Not Oxford! ... yet...)
Posts: 1,596
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n^2 - n + 41?
1 => 41 2 => 43 3 => 47 4 => 53 5 => 61 ![]()
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Janny's Songs Janny's lyrics and random photographs Tradition means giving votes to the most obscure of all classes, our ancestors. It is the democracy of the dead. Tradition refuses to submit to the small and arrogant oligarchy of those who happen to be walking about. ~ Mercutio... erm, GK Chesterton. |
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#82 | ||
Cyber Elf Lord
Join Date: Sep 2001
Location: Left of Rock, Right of Hard Place
Posts: 986
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Quote:
Quote:
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Sincerely, Anthony 'Many are my names in many countries,' he said. 'Mithrandir among the Elves, Tharkûn to the Drarves; Olórin I was in my youth in the West that is forgotten, in the South Incánus, in the North Gandalf; to the East I go not.' Faramir What nobler employment, or more valuable to the state, than that of the man who instructs the rising generation? Cicero (106BC-43BC) |
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#83 |
The Blobbit
Join Date: Feb 2004
Location: Kent, England (Not Oxford! ... yet...)
Posts: 1,596
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Hmm, but it worked.
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Janny's Songs Janny's lyrics and random photographs Tradition means giving votes to the most obscure of all classes, our ancestors. It is the democracy of the dead. Tradition refuses to submit to the small and arrogant oligarchy of those who happen to be walking about. ~ Mercutio... erm, GK Chesterton. |
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#84 | |
Cyber Elf Lord
Join Date: Sep 2001
Location: Left of Rock, Right of Hard Place
Posts: 986
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Quote:
41, 43, 47, 53, 59 The numbers are the prime numbers (Numbers with two factors, itself and (1) One). Prime numbers under 100: 02, 03, 05, 07, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
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Sincerely, Anthony 'Many are my names in many countries,' he said. 'Mithrandir among the Elves, Tharkûn to the Drarves; Olórin I was in my youth in the West that is forgotten, in the South Incánus, in the North Gandalf; to the East I go not.' Faramir What nobler employment, or more valuable to the state, than that of the man who instructs the rising generation? Cicero (106BC-43BC) |
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#85 |
The Blobbit
Join Date: Feb 2004
Location: Kent, England (Not Oxford! ... yet...)
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Ah! The irregular heartbeat of number theory!
Had I found a formula which linked all them that would have been impressive. Didn't Riemann find something to do with 41 in a prime number formula... *runs upstairs* Euler then... x^2 + x + 41, from x = 0 to 39 gives prime numbers. So I would have got if I'd assumed the sequence began with the 0th term.
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Janny's Songs Janny's lyrics and random photographs Tradition means giving votes to the most obscure of all classes, our ancestors. It is the democracy of the dead. Tradition refuses to submit to the small and arrogant oligarchy of those who happen to be walking about. ~ Mercutio... erm, GK Chesterton. |
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#86 | |
Cyber Elf Lord
Join Date: Sep 2001
Location: Left of Rock, Right of Hard Place
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Quote:
============================================= A snail is at the bottom of a 30ft well. Each day the snail climbs up 3 feet, but at night it slides down 2 feet. Assuming the snail continues to climb up the well at the current pace, how many days will it take for the snail to exit the well?
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Sincerely, Anthony 'Many are my names in many countries,' he said. 'Mithrandir among the Elves, Tharkûn to the Drarves; Olórin I was in my youth in the West that is forgotten, in the South Incánus, in the North Gandalf; to the East I go not.' Faramir What nobler employment, or more valuable to the state, than that of the man who instructs the rising generation? Cicero (106BC-43BC) |
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#87 | |
Elf Lord
Join Date: Jan 2002
Location: Israel
Posts: 6,975
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Btw, I still didn't succeed completing the 6x6 magic square. |
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#88 | |
High King at Annuminas Administrator
Join Date: Oct 2003
Location: Wyoming - USA
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My Fanfic: Letters of Firiel Tales of Nolduryon Visitors Come to Court Ñ á ë ?* ó ú é ä ï ö Ö ñ É Þ ð ß ® ™ [Xurl=Xhttp://entmoot.tolkientrail.com/showthread.php?s=&postid=ABCXYZ#postABCXYZ]text[/Xurl] Splitting Threads is SUCH Hard Work!! |
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#89 | |
Elf Lord
Join Date: Jan 2002
Location: Israel
Posts: 6,975
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#90 | |
High King at Annuminas Administrator
Join Date: Oct 2003
Location: Wyoming - USA
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My Fanfic: Letters of Firiel Tales of Nolduryon Visitors Come to Court Ñ á ë ?* ó ú é ä ï ö Ö ñ É Þ ð ß ® ™ [Xurl=Xhttp://entmoot.tolkientrail.com/showthread.php?s=&postid=ABCXYZ#postABCXYZ]text[/Xurl] Splitting Threads is SUCH Hard Work!! |
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#91 | |
Mootis per forum
Administrator Join Date: Dec 1999
Location: Spain
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Do not be hasty. That is my motto. Now we'll have a drink and go to the Entmoot. |
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#92 |
The Blobbit
Join Date: Feb 2004
Location: Kent, England (Not Oxford! ... yet...)
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Yeah, do you mean a triangle on the surface of a sphere? I assumed you meant internally, like us minions deal with cyclic angles...
Can someone explain to me imaginary numbers? I get that they go up and down from the left right of reality, but what justification is there to say 1i squared = -1?
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Janny's Songs Janny's lyrics and random photographs Tradition means giving votes to the most obscure of all classes, our ancestors. It is the democracy of the dead. Tradition refuses to submit to the small and arrogant oligarchy of those who happen to be walking about. ~ Mercutio... erm, GK Chesterton. |
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#93 | |
High King at Annuminas Administrator
Join Date: Oct 2003
Location: Wyoming - USA
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My Fanfic: Letters of Firiel Tales of Nolduryon Visitors Come to Court Ñ á ë ?* ó ú é ä ï ö Ö ñ É Þ ð ß ® ™ [Xurl=Xhttp://entmoot.tolkientrail.com/showthread.php?s=&postid=ABCXYZ#postABCXYZ]text[/Xurl] Splitting Threads is SUCH Hard Work!! |
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#94 | |
High King at Annuminas Administrator
Join Date: Oct 2003
Location: Wyoming - USA
Posts: 10,752
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Quote:
![]() (EDIT: makes me wonder why they bothered teaching it to us anyway! ![]()
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My Fanfic: Letters of Firiel Tales of Nolduryon Visitors Come to Court Ñ á ë ?* ó ú é ä ï ö Ö ñ É Þ ð ß ® ™ [Xurl=Xhttp://entmoot.tolkientrail.com/showthread.php?s=&postid=ABCXYZ#postABCXYZ]text[/Xurl] Splitting Threads is SUCH Hard Work!! |
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#95 |
The Blobbit
Join Date: Feb 2004
Location: Kent, England (Not Oxford! ... yet...)
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Hmm, I thought you got numbers which were compound like 5 + 7i?
To me the whole concept seems wrong and like Pythagorous with... um.. something... irrational numbers maybe... I will deny there logical existance as long as possible! But then again I believe in God... do you need an aspect of faith to accept imaginary numbers? ![]() ![]()
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Janny's Songs Janny's lyrics and random photographs Tradition means giving votes to the most obscure of all classes, our ancestors. It is the democracy of the dead. Tradition refuses to submit to the small and arrogant oligarchy of those who happen to be walking about. ~ Mercutio... erm, GK Chesterton. |
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#96 |
Elf Lord
Join Date: Jan 2002
Location: Israel
Posts: 6,975
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I have a question - this thread's aim is to ask questions about troubles you have in math (and I have many of that kind unfortunately) or to ask 'riddles' in math - like the snail one?
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#97 |
The Blobbit
Join Date: Feb 2004
Location: Kent, England (Not Oxford! ... yet...)
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I'm doing both, but I have more thirst for knowledge than questions I can pose.
So imaginary numbers? If they do exist, then it's saying there is a number which multiplied by itself equals the negative of itself. Right?
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Janny's Songs Janny's lyrics and random photographs Tradition means giving votes to the most obscure of all classes, our ancestors. It is the democracy of the dead. Tradition refuses to submit to the small and arrogant oligarchy of those who happen to be walking about. ~ Mercutio... erm, GK Chesterton. |
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#98 | |
Cyber Elf Lord
Join Date: Sep 2001
Location: Left of Rock, Right of Hard Place
Posts: 986
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Quote:
''i = sqrt(-1) i^2 = -1 i^3 = - sqrt(-1) i^4 = 1 Imaginary number exist (in your imagination ![]() ![]() I have seen imaginary numbers used in electrical engineering and physics. I am not sure exactly how, though.
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Sincerely, Anthony 'Many are my names in many countries,' he said. 'Mithrandir among the Elves, Tharkûn to the Drarves; Olórin I was in my youth in the West that is forgotten, in the South Incánus, in the North Gandalf; to the East I go not.' Faramir What nobler employment, or more valuable to the state, than that of the man who instructs the rising generation? Cicero (106BC-43BC) Last edited by mithrand1r : 04-15-2004 at 05:20 PM. |
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#99 |
Word Santa Claus
Join Date: Feb 2004
Location: Chicago, IL
Posts: 2,922
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i was "invented" in order to let you have square roots for negative numbers, because math works much more nicely if the square root function is defined for all x
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#100 |
The Blobbit
Join Date: Feb 2004
Location: Kent, England (Not Oxford! ... yet...)
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Yeah, I know they said things like engineering required them loads, but still. Of course now one looks at it you need to have an expression for a negative square root, but to look at it from the prespective that a number multiplied by itself to form a negative number is just a bit weird.
This may sound like a bit of a sad question, but do any of you hve a favourite proof? Are any of you as geeky as me to have that kind of thing?
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Janny's Songs Janny's lyrics and random photographs Tradition means giving votes to the most obscure of all classes, our ancestors. It is the democracy of the dead. Tradition refuses to submit to the small and arrogant oligarchy of those who happen to be walking about. ~ Mercutio... erm, GK Chesterton. |
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