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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#129 Re: This is Cool » Prime Numbers!! » 2010-05-30 03:37:22

Goldbach Conjecture: Every EVEN integer, greater than 2, can be written as the Sum of Two Prime numbers!
e. g. 7 = 5 + 2
18 = 5 + 13 = 7 + 11 etc.
This Decomposition of Integers into Prime numbers is called as Goldbach partition.

Goldbach Conjecture (Another Form): Every Integer, greater than 5, can be written as the Sum of Three Prime numbers!
e. g. 7 = 2 + 2 + 3
20 = 2 + 7 + 11 = 2 + 5 + 13 etc.

Goldbach Conjecture (Weak): All ODD Integers, greater than 7, can be written as the Sum of Three Odd Prime numbers!
e. g. 9 = 3 + 3 + 3
23 = 5 + 5 + 13 = 5 + 7 + 11 etc.


IMPORTANT: All these Forms of Goldbach Conjecture are STILL NOT PROVEN TO BE TRUE/FALSE!!
However, they have been Verified for numbers as large as 10[sup]14[/sup].

#131 Re: Puzzles and Games » Word Game #66 » 2010-05-29 06:07:31

Its crafty.. More than i thought!

#133 Help Me ! » Nice Geometry Problem! » 2010-05-28 23:51:00

ZHero
Replies: 5

Hi all...
This is a nice Geometry Problem proposed by one of my close friends!
I'm really stuck dunno and need some help....
Thanks!

#134 Puzzles and Games » Nice Geometry Problem! » 2010-05-28 23:48:13

ZHero
Replies: 0

Why is there no option for deleting the post?
There's no option for deleting the first post of the topic???

[plz delete this post.. i've copied it to Help Me section]

#135 Re: Jokes » Poem » 2010-05-28 22:05:31

[align=center]Affection, friendship and God speak to me,[/align]
[align=center]Though that damned Eros has been Greek to me...[/align]

[align=center]I put the cart before the horse,[/align]
[align=center]Then had to get a divorce,[/align]
[align=center]Now the mischievous angel's meek to me.[/align]

#136 Re: Maths Is Fun - Suggestions and Comments » Word Search Puzzle » 2010-05-28 21:20:32

I liked the game very much!

I'd like to fight it against time.. 730_machine_gun_shooting_smiley.gifWish there was a Timer too!

It'll add a taste of competitiveness too!? wink

#137 Re: Jokes » I Can Has Cheezburger! » 2010-05-28 20:50:14

Smiley_lol.gif

there's a spate of 'em!

Nice Find!!

#138 Re: Jokes » Silly Questions Funny Answers! » 2010-05-28 20:41:04

Q: How does a pig go to the hospital?
A:

Q: What did the necktie say to the hat?
A:

Q: What did one magnet say to the other?
A:

Q: What do you call a guy who's born in Poland, grows up in China, and then dies in Japan?
A:

Q: Why did the chicken cross the Moebius Strip?
A:

#139 Re: Jokes » More Jokes... » 2010-05-28 20:35:17

A Mathematician, a Programmer and an Electrical Engineer were on death row waiting to go in the electric chair.

The Mathematician was brought forward first. "Do you have anything you want to say?” asked the executioner, strapping him in.
“Yes,” replied the Mathematician "π has been the most amazing number i've seen in my life!". "Wow?" said the executioner and flicked the switch and nothing happened. Under State law, if an execution attempt fails, the prisoner is to be released, so the Mathematician was released.

Then the Programmer was brought forward. “Do you have anything you want to say?”
“Yes, there are too many bugs in your prison.”
"Hemipterans" and the executioner flicked the switch, and again nothing happened, so the Programmer was released.

Then the Electrical Engineer was brought forward. “Do you have anything you want to say?” asked the executioner.
“Yes,” replied he. “If you swap the red and the blue wires over, you might make this thing work.”

#140 Jokes » Short Jokes / One Liners » 2010-05-28 20:15:20

ZHero
Replies: 35

I asked God for a bike, but I know that God doesn't work that way. So I stole a bike and asked for forgiveness!


I got a gun for my wife, best trade I ever made!


If everything goes perfectly, something’s wrong!


Would a fly without wings be called a walk?


The future isn’t what it used to be.


Thinking is the last thing on my mind! wink

#141 Re: Dark Discussions at Cafe Infinity » Did you know? » 2010-05-28 20:13:04

#9. Did you know?

If all the mathematicians were laid end-to-end around the world, three-quarters of them would drown? roflol

#142 Jokes » Tech Acronyms » 2010-05-28 19:53:36

ZHero
Replies: 13

PCMCIA
People Can't Memorize Computer Industry Acronyms

ISDN
It Still Does Nothing

APPLE
Arrogance Produces Profit-Losing Entity

SCSI
System Can't See It

DOS
Defective Operating System

BASIC
Bill's Attempt to Seize Industry Control

IBM
I Blame Microsoft

DEC
Do Expect Cuts

CD-ROM
Consumer Device, Rendered Obsolete in Months

OS/2
Obsolete Soon, Too.

WWW
World Wide Wait

MACINTOSH
Most Applications Crash; If Not, The Operating System Hangs

PENTIUM
Produces Erroneous Numbers Through Incorrect Understanding of Mathematics

COBOL
Completely Obsolete Business Oriented Language

AMIGA
A Merely Insignificant Game Addiction

LISP
Lots of Infuriating & Silly Parenthesis

MIPS
Meaningless Indication of Processor Speed

WINDOWS
Will Install Needless Data On Whole System

GIRO
Garbage In Rubbish Out

MICROSOFT
Most Intelligent Customers Realize Our Software Only (for) Fools (&) Teenagers.



Redirects here: coolfunnyjokes

#143 Re: Jokes » Another Blonde Joke » 2010-05-28 19:37:54

I ran into this one...

A blonde, wanting to earn some money, decided to hire herself out as a handyman-type and started canvassing a wealthy neighborhood. She went to the front door of the first house and asked the owner if he had any jobs for her to do.

"Well, you can paint my porch. How much will you charge?"
The blonde said, "How about 50 dollars?" The man agreed and told her that the paint and ladders that she might need were in the garage. The man's wife, inside the house, heard the conversation and said to her husband, "Does she realize that the porch goes all the way around the house?"
The man replied, "She should. She was standing on the porch."

A short time later, the blonde came to the door to collect her money.
"You're finished already?" he asked. "Yes," the blonde answered, "and I had paint left over, so I gave it two coats. "Impressed, the man reached in his pocket for the $50. "And by the way," the blonde added, "that's not a Porch, it's a Ferrari!"

#144 Re: Puzzles and Games » Add 13 more and post it forever. » 2010-05-28 18:53:18

6916

Consider a Triangle with vertices (6, 9) (9, 1) (1, 6).

Perimeter = √34 + √73 + √89

34 + 73 + 89 = 196

196 = (13+1)[sup]2[/sup]

169 = 13[sup]2[/sup]

961 = 31[sup]2[/sup]

#145 Re: Puzzles and Games » Find a number... » 2010-05-28 16:47:52

TheDude wrote:

You need to check 2 more cases.

CASE-IV: 9(11a+b) = 10x9
11a+b = 10 ⇒ a=1 and b=-1 Not Possible

CASE-V: 9(11a+b) = 19x18
11a+b = 38 ⇒ a=3 and b=5
a+b+c = 19
c = 19 - (a+b) = 19 - (3+5) = 11 Not Possible

up

I always miss one thing or the other..........dizzy

#146 Re: Jokes » Another Blonde Joke » 2010-05-28 16:44:27

Tigeree wrote:

You think that's sad, ...

sad

#147 Re: Maths Is Fun - Suggestions and Comments » Date and Time! » 2010-05-28 01:57:40

Is it that displaying the "Live Time" can cause little problem with Slow Connections?

If yes, then the idea of "current PC time" is not bad at all !!

#148 Re: Puzzles and Games » One or two Cryptic Crossword Clues etc » 2010-05-28 01:47:27

Gurth.. At first, it appeared to me that the words about WITHOUT needed to be exchanged!?
And I mistakenly took the word "concocted" too as a part of the clue...
winking.gif

#150 Re: Puzzles and Games » Add 13 more and post it forever. » 2010-05-27 22:44:14

6799 = 313 + 131 + 31 + 13 + 33 + 1 + 1


6 + 7 + 9 - 9 = 13

6 + 7 + 9 + 9 = 31


670099 is a Prime number.

6790009 is a Prime number.

67900009 is a Prime number.

60000799 is a Prime number.

60700909 is a Prime number.

600007009009 is a Prime number.

600000000799 is a Prime number.

6000070000090009 is a Prime number.

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