Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#1426 2012-04-06 03:00:46

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Is this cool with you?

hi bobbym


“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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#1427 2012-04-06 03:01:53

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

Hi;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1428 2012-04-06 03:07:38

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Is this cool with you?

Are you sure?


“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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#1429 2012-04-06 03:09:15

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

What is the sum of the distances that you get from your point to the 3 vertices?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1430 2012-04-14 15:17:18

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Is this cool with you?

Hi bobbym

Last edited by anonimnystefy (2012-04-14 15:50:23)


“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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#1431 2012-04-14 16:16:56

mathmatiKs
Member
Registered: 2012-04-14
Posts: 45

Re: Is this cool with you?

Hello, I come with a problem, I leave to be seen.

How de you place 8 queens on a chess board so that does not attack each other?

(I found 64 solutions) big_smile

Last edited by mathmatiKs (2012-04-14 16:19:26)


"... And as we let our own light shine, we unconsciously give other people permission to do the same. As we're liberated from our own fear, our presence automatically liberates others."

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#1432 2012-04-14 16:21:23

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

Hi mathmatiKs;

Please put this in the thread "Help me" or "Exercises"


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1433 2012-04-14 16:21:41

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Is this cool with you?

Hi mathematiKs

Welcome to the forum!

Here is link related to that puzzle:The Eight-Queens Puzzle


“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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#1434 2012-04-14 16:38:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

Hi anonimnystefy;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1435 2012-04-14 16:40:02

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Is this cool with you?


“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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#1436 2012-04-14 16:45:04

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1437 2012-04-14 16:49:27

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1438 2012-04-14 16:53:28

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Is this cool with you?

Sorry,wrong numbers...


“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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#1439 2012-04-14 16:58:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1440 2012-04-14 19:51:14

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Is this cool with you?

Hi bobbym


“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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#1441 2012-04-15 00:24:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1442 2012-06-06 12:41:48

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

New problem:

A group of teachers is preparing examinations. Each test contains 4 different problems, chosen from a master list of 15 problems. Two different tests have at most one problem in common. What is the biggest number of tests that can be formed?

A says) 123454321 different tests.

B says) How did you come up with that?

A says) Parity and the properties of hyperharmonic series.

C says) Darn good answer A!

A says) Thanks, but the hyperharmonics are my specialty.

D says) I did not get that A. I counted them up and got...

A says) Hold on right there D. There is your mistake. Computation can never replace pure mathematics.

E says) You hold on, you are saying that he counted wrong?

A says) Counting, Schmounting! It is not whether or not you get the right answer but how beautifully you structure the answer that counts.

E says) Or mangle it as in your case. B, what did you get?

B says) I got 1351350 but I am not sure.

What do you get?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1443 2012-06-23 21:39:54

gAr
Member
Registered: 2011-01-09
Posts: 3,479

Re: Is this cool with you?

Hi bobbym,


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

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#1444 2012-06-23 23:04:29

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

Hi gAr;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#1445 2012-06-23 23:18:02

gAr
Member
Registered: 2011-01-09
Posts: 3,479

Re: Is this cool with you?

Hi bobbym,


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

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#1446 2012-06-23 23:28:04

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

Hi gAr;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Offline

#1447 2012-06-23 23:42:15

gAr
Member
Registered: 2011-01-09
Posts: 3,479

Re: Is this cool with you?

Hi,


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

Offline

#1448 2012-06-23 23:47:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

Hi gAr;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Offline

#1449 2012-06-23 23:53:49

gAr
Member
Registered: 2011-01-09
Posts: 3,479

Re: Is this cool with you?

Thanks!
I was wondering if there's a generalization to this.
From oeis, for selecting 2 questions, the sequence is called Tritriangular numbers, but could not find anything beyond 2 questions.

Nice problem!


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

Offline

#1450 2012-06-23 23:57:52

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,366

Re: Is this cool with you?

Hi gAr;

I did not think to look over there. Thanks for telling me.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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