Math Is Fun Forum

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

You are not logged in.

#151 Re: This is Cool » Cool Subtraction For Kids » 2006-12-15 03:21:23

Devanté - you still havn't explained your method however.

On-topic:
When I was in primary school, sometimes we were made to show the borrowing thing. I HATED when we had to do it. If I've understood this topic correctly, I think I'm doing it the same way you guys. It just seems much more obvious to me.

#152 Re: Dark Discussions at Cafe Infinity » Mental arithmetic making you look bad? » 2006-12-15 03:09:56

As a fun little game, the dices are fine. However, if you really want to compete, against yourself or others, numbers and an input-box would be preferable though.

#153 Re: Dark Discussions at Cafe Infinity » Attention: The Arctic is to melt mostly by the summer of 2040 » 2006-12-15 02:58:23

How is this whole exponential melting happening? I mean, what makes it happen.

#154 Re: This is Cool » 0.9999....(recurring) = 1? » 2006-12-15 02:52:11

Anthony - you're assuming that 4.(9) is not 5.

#155 Re: This is Cool » liquid simulation » 2006-12-14 08:19:16

I got half the 'water' to disappear... Had the stone(round thing) in the bottom, and then it disappeared tongue

#156 Re: Dark Discussions at Cafe Infinity » Mental arithmetic making you look bad? » 2006-12-13 09:31:53

Well, I wouldn't say I'm bad at arithmics. However, I totally get what you mean. Somehow, a lot of people can't understand you can be good at math, even if you're not very sharp at arithmetics.

#157 Re: Help Me ! » Equation of a parabola » 2006-12-12 06:02:15

Given three points (x[sub]1[/sub];y[sub]1[/sub]),(x[sub]2[/sub];y[sub]2[/sub]) and (x[sub]3[/sub];y[sub]3[/sub]), you can find the equation of the parabola using the following equation:

that's what my textbook says anyway tongue never used it..

#158 Re: This is Cool » 0.9999....(recurring) = 1? » 2006-12-12 05:43:29

Anthony.R.Brown wrote:

To Ricky!

Ok lets do this 1/3 = Infinite 0.33333333333333333333...................

Agreed! and....Infinite 0.9 = 0.99999999999999999999................... which you say = 1 

So if you are correct then Infinite 0.3333333333333333.................. must = > 0.3

What kinda of logic are you applying here? I could understand you, if we were saying that 0.99... = 0.9 but we're not

#159 Re: This is Cool » 0.9999....(recurring) = 1? » 2006-12-11 05:06:59

Anthony you are beyond reach man. Ricky is trying to explain why your answer can't be answered(because it simply doesn't make sense) by asking you a question in return.

#161 Re: Help Me ! » ????? » 2006-12-09 09:33:07

remember you can do greek letters by putting a \ in front of the name of the letter.

#162 Re: Help Me ! » any maths genuises? help plz! simple question. » 2006-12-08 08:34:56

I'm not sure what you're looking for but maybe this?

#163 Re: This is Cool » The best result in all of mathematics » 2006-12-08 07:59:02

Ah, I can see why people would choose

. It's just that awesome, good job Euler :]

#164 Re: This is Cool » pentagon conjecture » 2006-12-08 07:49:56

Not really:


It's great to see you're experimenting though, keep on doing that!

edit: Misread what you said.. I don't think that the ratio you're describing has anything to do with the golden ratio(might be wrong), Rod just said the pentagon has the Golden Raito in it.

#165 Re: This is Cool » Nullity? » 2006-12-08 07:18:47

Oh my g.. I'm never going to believe in anything without prooving it myself first from now on wink

Anyway, Dr Anderson.. DR?! How in the world can a person with that degree fail so hard at understanding 0 and infinity?

edit: Okay, this doctor degree seems to be different from the danish doctor degree. In Denmark, it's the highest academic degree possible to obtain, but apparently this is the same as what's called "licentiat" in Danish(aka P.hD). Still, teaching this to children without the aproval of the math community is a very bad career choice in my opinion.

#166 Re: Puzzles and Games » Trivia Thread? Woot » 2006-12-07 02:47:12

Let me just tell you, we've had plenty smile

#167 Re: Dark Discussions at Cafe Infinity » movies » 2006-12-07 02:44:25

I totally agree! Very good movies, can't wait for the third one!

#168 Re: Jokes » Christmas Jokes! » 2006-12-06 04:16:05

Well, getting the date right helps, I guess...

#169 Re: Puzzles and Games » Mystery new-fangled trig??? » 2006-12-06 04:13:14

I have no idea what curve it is, but perhaps the filename can give someone a clue? smile

#170 Re: This is Cool » 100 » 2006-12-06 04:01:43

John E. Franklin wrote:

Wow! Einstein was a curious little six year old!!   1 + 2 + 3 - 4 + 5 + 6 + 78 + 9 = 100
That's like something I would do now between 35 and 45 years old.

Brilliant, no less smile

#171 Re: This is Cool » 0.9999....(recurring) = 1? » 2006-12-06 03:06:23

That doesn't even make sense... Why would you do that? You can't keep on counting and eventually reach infinity. It's not a point, like the wall you described.

#172 Re: This is Cool » e to a million places! » 2006-12-05 10:43:34

Reminds me of a site I have in my bookmarks: http://antwrp.gsfc.nasa.gov/htmltest/rjn_dig.html

edit: what were you doing at totse anyway ? tongue
edit: okay - desided to try to remember some of these digits tongue My first time doing that.
2.718281828459045235360287471
is what I've got so far.
These beginning blocks are very easy. First goal is 50 digits, wish me luck! (I'm always had a horrible memory)

#173 Re: This is Cool » 0.9999....(recurring) = 1? » 2006-12-05 01:42:07

Anthony - how about you start to prove the proofs false instead of writing nonsense

#174 Re: Help Me ! » Summation » 2006-12-05 01:38:31

Well, the lower boundary(don't know the correct english term) should be 51 if you want the sum of numbers from 51 to 120.

#175 Re: Exercises » perimeter problem » 2006-12-05 00:46:00

Love_summers wrote:

Hum...not so easy.

I'll explain this in detail, since I don't know your 'level of skill':

Hope it helps if you had trouble understanding it Love_summers (and others)

Board footer

Powered by FluxBB