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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi phrontister;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,374

Hi Bobby,

"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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi;

I used the one on top of the page here at the forum. For some Firefox settings it does not print correctly.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

**Online**

**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,374

Hi Bobby,

The code Π (with a semicolon immediately after it - I can't include it or the code disappears from my post) prints the symbol about one third larger than MIF's...but it's still the same unclear shape.

This code: Π

MIF's: π

Maybe MIF's can be enlarged to distinguish it from the letter 'n'...but I don't know how to do that.

Letter n: n

MIF's pi: π

I use Google Chrome, on which the two are very similar.

*Last edited by phrontister (2011-11-25 23:34:24)*

"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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

**Online**

**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,374

Hi Bobby,

"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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,374

Hi Bobby,

I guess there'd be several ways other than mine to solve that problem: the popular way, your way and gAr's way.

Would you like to post yours? If it's not too advanced, that is. Remember, I can't even spell jeometree.

PS...That "m" in "jeometree" nearly looks like an "r" followed by pi:

m vs. rπ

*Last edited by phrontister (2011-11-26 00:48:58)*

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi phrontister;

My solution comes from using experimental methods. I used geogebra for this and all other geometry problems. I have even been experimenting with it to do programming tasks. It is an awesome tool. I will post the whole solution in the Computer math section. Just give me a little time.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

**New Problem**

**The argument between A and B has intensified. They are now at the point where they want to fight a duel. Both being mathematicians of sorts they argue for a long time on the rules. A is a poor shooter. He hits his target 35% of the time. B is more accurate, he hits his target 54% of the time. They agree to these rules.**

**A shoots first 1 time. If B is still alive then B shoots 1 time. Then A shoots 2 times. Next B shoots 3 times, followed by A shooting 5 times. The number of times each shoots is the next Fibonacci number. What are the chances for both duelists?**

**A says) Of course I am the favorite to kill that B guy.**

**B says) Not in the long run!**

**C says) I want B dead too, if A does not get him, I will.**

**D says)Too bad this is not a 5 way duel!**

**E says) I agree! Just one thing though how are you each going to carry an infinite number of bullets?**

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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

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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi gar;

That is correct. Very good answer, I agree I do not know if those numbers are expressible in known constants.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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

Hi bobbym,

Okay, thanks!

"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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi gAr;

The person who posed that got a different answer than we did.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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

Hi,

What did that person get?

"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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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi;

I do not remember but it was not right. He got that B has a higher percentage which is clearly wrong.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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

Okay.

Yes, B would definitely have a lower percentage.

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi;

How is your schoolwork coming?

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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

It's mostly rote, dull!

I'm stuck in this system.

How's the problem which you were trying?

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Bad, it seems very lucky that I got the right answer. I can not generalize it.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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

Okay.

I'll take some rest.

See you later.

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

**20 random numbers are drawn from a normal distribution with mean 4 and standard deviation 2. They are labelled a1 to a20. A random number called b is drawn from a normal distribution with mean 3 and standard deviation 3.**

**What is the chance that b is greater than 10 of the a's?**

**A says) 1 / 21B says) About .0307188C says) .03125D says) 1/2E says) It is a complicated expression but one of those answers is right.**

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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

Hi bobbym,

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

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,701

Hi gAr;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

**Online**

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

Hi bobbym,

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

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