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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#2 Re: Introductions » short cuts » 2009-06-11 22:54:40

Short cut maths? You mean-like-learning everything in a week?

hi anyway wink

#3 Re: Help Me ! » 1=2 proof » 2009-06-11 22:48:52

That's the first false proof I've found the fault in smile

Division by 0.. (a-b), where a=b

#4 Re: This is Cool » Talking in binary » 2009-06-11 22:41:55

What on earth is the second one? I got the first one though ;P

#5 Re: This is Cool » A man sent into the future » 2009-06-10 08:04:43

I see.. You'd better talk to the Guinness Book editors then.. Largest Time Shifting of a Human

#6 Re: This is Cool » A man sent into the future » 2009-06-10 01:07:25

He is basically sent 1/50th of a second into the future, so he dies 1/50th of a second further into the future than he's meant to smile

#7 This is Cool » A man sent into the future » 2009-06-10 00:39:35

DarkLightA
Replies: 5

According to scientists, a man who was in space for 7 years came back and was 1/50th of a second "ahead of himself". This has something to do with Einstein's Theorem of Relativity I think.

This has also been done with a type of clock, of which two clocks were started the same, and one was sent into space.


THIS IS FASCINATING!

DLA

#9 This is Cool » 0^0 » 2009-06-09 18:48:38

DarkLightA
Replies: 4

I think 0^0 is just as interesting as dividing by 0 (very interesting), but that is possibly because it is:

n^0=n/n where n is any number but 0.

So what about 0^0?

Well, there are multiple arguments:

0^0=1, because n^0=1
0^0=0, because 0/0=0
0^0=∞, because 0/0=∞

And then you get back into the dividing by 0 scenario...


Please share your thoughts about this.



DLA

#10 Re: This is Cool » 7*11*13!!! » 2009-06-09 18:38:40

Any number with an even number of digits that is a palindrome (same forwards and backwards, like 529925) is a multiple of 11.

#11 Re: This is Cool » seven and thirteen » 2009-06-09 18:36:13

Hmm.. Never heard of this.. Is there a use for this sequence?

#12 Introductions » Lookig for a friend » 2009-06-09 07:59:40

DarkLightA
Replies: 3

For my entire 13-year old life I've loved maths. I enjoy participating in national math tests "for fun". In one UKMT test (if any of you have a clue what that is wink), which I was one grade too young to participate in, I got 180th place out of about 72,000.

I'm also 2 years above my grade in maths. I can easily do over 15 hours of math classwork in a weekend. IT'S FUN!

Any others that are in a similar situation? I'd love to have contact with someone like me. Feel free to e-mail me: darklighta42 (a) g mail.com


DLA

#13 Re: Introductions » Hello all » 2009-06-09 07:50:08

Hey WinterSolstice! I'm also a huge fan of math! I'm 13, how about you?

#14 Re: Jokes » Some interesting facts... » 2009-06-09 07:46:36

#211
The King of Hearts is known as the "Suicide King", because of the position of the sword, which makes it look like it is sticking through his head!

#15 Re: Jokes » Some interesting facts... » 2009-06-04 08:11:33

[size=15]200!![/size]

201) "Rhythm" is the longest English word without a vowel.
202) Any month starting on Sunday will have a Friday the 13th
203) Past tense of to dare? DURST!
204) A snail can sleep for 3 years
205) A human's brain is still active 37 hours after death.
206) An average pencil has enough graphite for a 35 mile line

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