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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#676 Re: Dark Discussions at Cafe Infinity » History; What's Your Favourite Era? » 2006-11-22 16:27:19

I wouldn't want to live in the past since there is no time in the past that has been as good as life now. I wouldn't be a Pharaoh of Egypt or Emperor of Rome in place of my life now, as an average citizen. We are very lucky to be living in this time and age.
As for my favorite era in history, I would have to say recent history, especially Australia's because I find it the most relevant to my life.

#677 Re: Maths Teaching Resources » Crazy Teachers » 2006-11-22 16:20:59

If you're enthusiastic about maths, I'm sure you'd make a wonderful teacher big_smile

#678 Re: Puzzles and Games » Conundrums » 2006-11-22 16:05:52

what is this Countdown? what

#679 Re: Dark Discussions at Cafe Infinity » Languages; What Are Yours? » 2006-11-22 16:01:46

So I'm like, trilingual and a half:
I can speak English, 1337, bad Engrish, and I'm learning chineseup

#681 Help Me ! » Odd Problem » 2006-11-20 20:42:55

Toast
Replies: 1

We got this from our P.E teacher when we had nothing to do in class, so here goes:

Pick a 4 digit number where the same digit is not repeated:
e.g

1234

Now find the number which is made up of the digits reversed:

4321

Now subtract your original number from it:

3087

Multiply the result by any number from 1 to 9, e.g:

3087*4
= 12348

Now circle any digit in the number and say the other digits of the number. Given the other digits, another person would be able to solve for the circled digit. How is this so?

#682 Re: Guestbook » math word problems » 2006-11-20 18:07:12

...so long as they're describing the abstract. I hate problems which are practical and which can be applied to everyday life.

#683 Re: Exercises » Basic Sequences » 2006-11-20 04:48:28

State whether the following sequences are geometric or algebraic and state the nth term:
16. 1.25, 2.75, 4.25, 5.75
17. 3, -3, 3, -3
18. 2, 4, 8, 16
19. 3, -9, 27, -81
20. 5, -1, 1/5, -1/25

#684 Re: Help Me ! » Next » 2006-11-20 04:39:15

Well, you've done the hard part already, just solve it as a normal quadratic now. Make one side of the equation equal to zero and use factorisation and the null factor law or the quadratic formula.

#686 Re: Maths Is Fun - Suggestions and Comments » Private Messaging » 2006-11-20 00:25:16

But then moderators would have a heap of work on their hands, considering people could just join up for the sake of pming for no apparent reason.

#687 Re: Introductions » hi! (._"_.) » 2006-11-19 18:38:59

That's an awesome avatar haruka smile, is it yuna?

#689 Re: Dark Discussions at Cafe Infinity » Languages; What Are Yours? » 2006-11-19 04:04:15

It would great know every languages, like have world key.

#691 Maths Is Fun - Suggestions and Comments » Private Messaging » 2006-11-19 03:06:23

Toast
Replies: 46

I was just wondering why this forum doesn't have pms. It's quite common on other forums i've been to.

#692 Re: Guestbook » Ohhhh » 2006-11-18 07:14:19

actually, only the quoted LaTeX does, the one in the original had to be... modified to fit.

#694 Re: Guestbook » Excuse me... » 2006-11-18 05:24:42

Oh noes! It's not working! It's a disaster!

#695 Re: Guestbook » Excuse me... » 2006-11-18 05:23:39

\mbox {A toast to all the quotes Toast will toast in the future!}

#696 Re: Guestbook » Ohhhh » 2006-11-18 05:19:47

Toast wrote:

Ok, now solve for x:

Oh, and in case you were wondering,

#697 Re: Guestbook » Ohhhh » 2006-11-18 05:17:57

Geeks are supposedly the exact opposite of cool... so...
If you get A's for everything, go on to become a theoretical hyper-dimensional topological astrophycist and earn the big bucks (in other words have a successful career), you must suffer the title of 'geek'.
Whereas you are 'cool' if, stereotypically, have a some wit, an attitude, sunglasses, and would rather party than study. 90% of people I know would like to be cool. Supposedly you can't be a geek or 'cool' at the same time. Supposedly cool people are preferred by society.
Thus, most of society will go on to become cool and the 10% of the geeks will go on to become rich, famous, and smart, (and possibly may take over the world) but will nevertheless still remain the laughing stock of the rest of the world.
Such is life.

#698 Re: Maths Is Fun - Suggestions and Comments » Equation of a Straight Line » 2006-11-17 19:51:53

Zhylliolom wrote:

I've never heard of any of the equations in this thread. In my studies I have always used



where ζ is Riemann's zeta function, Γ(x) is the gamma function, ∇ is the del operator, L[sup]-1[/sup] denotes the inverse Laplace transform, T[sub]n[/sub] is the nth Chebyshev polynomial of the first kind, C is a simple closed curve bounding a region having z = a as an interior point, σ[sub]0[/sub][sup]m[/sup] is a simplex of an oriented simplicial complex and [σ[sup]m[/sup], σ[sup]m - 1[/sup]] is an incidence number, S is a compact, orientable, differentiable k-dimensional manifold with boundary in E[sup]n[/sup] and ω is a (k - 1)-form in E[sup]n[/sup], defined, and C[sup]1[/sup] at all points of S, and η(x) is Dirichlet's eta function.

(Sorry for stealing your joke, Ricky. sad)

...is that actually a straight line equation or is it a whole bunch of mathematical mumbo-jumbo?

#699 Help Me ! » Maths Exam » 2006-11-17 16:13:02

Toast
Replies: 1

So I've got my math exam coming up next week and I think I've studied a lot more than I did for last semester's. It includes the topics: Pythagoras Theorem and Surds, Formulae, Congruent and similar Triangles, Quadrilaterals, Measurement, Linear Relations, Quadratic Relations, and Trigonometry.
I've done practically every problem in the workbooks and last year's exam papers, and I went pretty well on them - is there anything else I can do to prepare or have I got every base covered?

#700 Re: Guestbook » cool » 2006-11-17 15:52:49

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