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#1101 2013-01-31 03:34:12

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

It doesn‘t mean that the drawing is correct and isn‘t missing a solution...


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#1102 2013-01-31 03:41:04

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#1103 2013-02-23 22:48:48

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

New Problem:

C is playing with the diophantine equation
5*a + 25*b  + n*c = r.
He would like to find the largest integer value of n so that for every integer r > 30 the equation has a solution. He asks our distinguished panel:

A says) Thanks to Weirstrass and Poincare we know there is no way to find the answer.

B says) I think you mean Cayley, anyway I have the answer.

C says) Ah yes, Poincare! It is obvious that n = 1 is the only answer.

D says) Poincare?

E says) One is not the answer.

Can you find n?

Last edited by bobbym (2013-02-23 22:49:11)


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1104 2013-02-28 03:17:49

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

Should a,b and c be integers?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1105 2013-02-28 03:26:21

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

Hi;

Yes they should.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1106 2013-04-07 12:42:29

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

Is 8 the answer?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1107 2013-04-07 12:50:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

Hi;

I do not remember what the answer is, do you require it?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1108 2013-04-07 12:53:00

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

Not immediately. I would like to check it, though.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1109 2013-04-07 13:06:06

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

How did you get that answer?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1110 2013-04-07 13:07:09

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

By checking.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1111 2013-04-07 13:11:02

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

Yes, but what did you check?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1112 2013-04-07 13:15:10

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

I figured out n cannot be greater than 31 and that it must be one of the numbers 31, 26, 21, 16, 13, 11, 8, 7, 6, 4, 3, 2, 1. I checked if the equation has solutions for r=31, 32, 33 and 34, and the largest of the aforementioned numbers for which those equations had solutions was 8. What do you get?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1113 2013-04-07 13:17:12

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1114 2013-04-07 13:19:19

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1115 2013-04-07 13:20:59

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

Hi;


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1116 2013-04-07 13:21:25

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

Which?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1117 2013-04-07 13:24:24

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1118 2013-04-07 13:28:35

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

The first one I get. The second one I do not. Can you explain it?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1119 2013-04-07 13:32:13

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

Table[{k, FrobeniusNumber[{5, 25, k}]}, {k, 2, 27}]


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1120 2013-04-07 13:36:44

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

Hm, and you look for the first number in the table which is less than or equal to 30, right?

Last edited by anonimnystefy (2013-04-07 13:37:11)


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1121 2013-04-07 13:40:41

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

Yes, can you explain the command used?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1122 2013-04-07 13:42:04

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

Table or FrobeniusNumber?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1123 2013-04-07 13:45:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

Table, why was 27 too much?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#1124 2013-04-07 13:48:32

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,656

Re: Bafflers?

Because it is obvious we cannot make 31 with {5,25,27}.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

Online

#1125 2013-04-07 13:53:15

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,438

Re: Bafflers?

Yep! We are done.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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