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

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#4201 Re: This is Cool » My Great Theory » 2006-08-01 23:18:43

Maybe...but that one person made all those rules. He had two objects, each meaning 1 (1 stick and 1 stick). He thought "ah, perhaps there is a way to combine both the 1s?". And he probably named that number 2. And then with the 3 1s, and so forth until he became so confused he didn't want to continue.

All this information from this person was expanded, and other people made their own stuff up, with their own rules. All the stuff was passed on, and that is probably how we came up with all these formulas today.

tongue

#4202 Re: This is Cool » A Pi Fundraiser » 2006-08-01 23:09:26

Nice T-Shirt - I hope you reach/have reached your target! smile

#4203 Re: This is Cool » Apparently it is OK to say "hey ppl itz da best, k cu ltr" » 2006-08-01 22:59:58

What that article is saying is true, but I know a lot of people who talk using acronyms, shortened words and emoticons (yes, emoticons! >.<). A conversation I heard the other day between two girls:

"Lol that was so g-r-8!"
"yeah all the ppl were like oh itz da worst evar! i mean, that dod was g-r-8!"
"btw was was ur asl agin?"
"brb"

Not only is that slightly hard to understand, but it is kinda stupid, not to mention lazy. What's the point in substituting 'by the way' with 'btw'? Or 'ur' with 'you are'?

It's not too big of a problem, but I think it is slowly heading that way. It's just takes one person to start it all off...

And what confuses me is that fact that one of them asked for asl. Shouldn't it be obvious? O_o

#4204 Re: Puzzles and Games » Devanté's Riddle House » 2006-08-01 20:31:46

All_Is_Number

I'll stop doing hides from now on as it takes too long too mark them. I'll just say which ones were correct and which were incorrect...

Correct answers:

41
42 - I'll accept, but it wasn't the answer I was looking for
43
44
46 - Correct but I wasn't thinking of it being in a blender, lol
48
49
50
51
53
54
55
56
58
60

45, 47, 52, 57, 59 remain for that section.

Ricky - ...I guess, if you think about it that way, but it wasn't the answer I was looking for. Think soft. wink

There is also another answer for #52.

#4205 Re: This is Cool » The First Hard Drive from 50 Years Ago » 2006-08-01 08:20:51

Pretty interesting...it's quite amazing how technology has evolved over the years. It's just like the first amplifier...

#4206 Re: Help Me ! » I need it for the Alien Game » 2006-08-01 08:18:12

First I made a snapshot (ctrl+print scrn) of the window, cropped it down to size, compressed it, then uploaded it on ImageShack and posted it here. smile

I'm still trying to solve that level - I'll post a snapshot of the correct settings of how to launch the vehicle. It'll take some time to do it, though.

#4207 Re: Guestbook » Compliments » 2006-07-31 23:06:15

I'll aim to be on here 22/7 ^_^

Although that is relatively impossible...

#4208 Re: Help Me ! » I need it for the Alien Game » 2006-07-31 19:57:24

I think flo might mean Warthog...I'll check level 15 out.

Flo: Is this the level?

warthog15wy1.png

#4209 Re: Guestbook » Compliments » 2006-07-31 19:29:42

Math is...therapeutic? I could live without mathematics, but it is actually my favourite subject, next to music (almost the same but not exactly the same). It gets my brain in gear when I need to the most, and without it, you wouldn't know the joy of numbers.

This forum is one of the best forums I've been on, actually. I've never seen a forum based on mathematics before (well, I have, but the others are mostly full of spam - Not all of them, of course, but some of them are...), and this is by far the best of all of them. I'm on here 12/7 (not literally, of course, I do take breaks tongue) and I enjoy posting here. I still think I could be more active, though - On another forum I had about 500 posts in one day! O.o

Luckily, it wasn't spam. tongue

#4210 Re: Exercises » Completing The Square » 2006-07-31 19:08:57

6. x² + x + -3.75 = 0
7. x² + 5x + 6 = 0
8. x² + 2x + 1 = 0
9. x² + 3x + -10 = 0
10. m² + -4m + -21 = 0
11. 3k² + 18k + 15 = 0
12. 2n² + -22n + 60 = 0
13. 4y² + 8y + -21 = 0
14. 8y² + 10y + -3 = 0
15. 50k² + -20k + -6 = 0
16. 100x² + -100x + 9 = 0
17. 10t² = t + 2
18. 18m² + 6m + 6 = 6m² + 30m + -3
19. p² + -0.75p + 0.125 = 0
20. 2x² = x² + 1.75 + -3x
21. x² = 0.6x + -0.08
22. 3y² + -2.55y + -1.0 = 0.5
23. j² + -3.5j + 1.5 = 0
24. c² + 3.75c + -1 = 0
25. w² + 10.1w + 1 = 0
26. x² + -11.5x + -6 = 0

#4211 Re: Exercises » Basic Addition » 2006-07-31 18:43:13

Please note, these are not decimal addition problems, the point for the number of the problem might just confuse you. I might replace the point after the number of the problem later with brackets.































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#4212 Re: This is Cool » Pi to a Million Decimal Places! » 2006-07-31 18:31:42

Nice strategy - Either 4 or 5 is good. It's good to vary it, but I like grouping them together.

After the 502884, that, to me, is like an end of a chapter. And then, 2534 2117 0679 is like the end of another chapter. Then, to me, it starts to get slightly harder, I don't know why, though.

Some may not be able to understand me, but you can actually hear some sort of pattern in how the numbers are read aloud. Not a real pattern, but it sure does seem like it.

#4213 Re: Exercises » Basic Algebra » 2006-07-30 19:09:27

More Excercises

11. x - 6 = 5
12. 62 = 6x + 6x + 2
13. 4(-1 + 5x) = -44
14. 2x + 5 = -19
15. -4 + 4x = x - 37
16. 14 = x + 10
17. x + 3 = 6
18. -2 + x = 3
19. x / 3 = 4
20. x + 1 = 10
21. 2x + 10 = 2
22. 7x + 8 = 8
23. 10 + 5x = 50
24. 4x + 1 = 41
25. 6 + 4x = -26
26. -5 - 6x + x = 0 
27. 2 - 2x - x = -7
28. -12 = -x + 5x + 8
29. 2 = - 3x - x + 10
30. 3 - 2x - 2x = 35
31. -6x - 3 = 5x - 3
32. -5x + 9 = 9 + 2x
33. -2 + 5x = 4x - 13
34. -6x + 5 = 29 - 4x
35. 5 - 2x = -7x - 35
36. -3(6 + 5x) = -183
37. 4(-6x + 9) = 324
38. 5(7 - x) = 5
39. -5(-2x + 9) = -125
40. 3(6x + 2) = 114

#4214 Re: This is Cool » Pi to a Million Decimal Places! » 2006-07-29 20:18:46

Oh no, now I have a a doubly hard record to beat. sad

#4215 Re: Exercises » Basic Polygons » 2006-07-29 19:44:52

6. What is the name of a regular, well-known shape with 3 sides?
7. What is the name of a regular, well-known shape with 4 sides?
8. What is the name of regular, well-known shape with 5 sides?
9. What is the name of a regular, well-known shape with 6 sides?
10. What is the name of a regular, well-known shape with 7 sides?
11. What is the name of a regular, well-known shape with 8 sides?
12. What is the name of a regular, well-known shape with 9 sides?
13. What is the name of a regular, well-known shape with 10 sides?
14. What is the name of a regular, well-known shape with 11 sides?
15 What is the name of a regular, well-known shape with 12 sides?
-------------------------------------------------------------------------------------

#4216 Re: This is Cool » Pi to a Million Decimal Places! » 2006-07-29 19:38:22

83,431? Isn't that pass the current world record...? Wow, he must be amazing...

Now I see what you mean - You're right, it would take a long time. A long, boring time, and I guess stopping only to eat or drink...:P

#4217 Exercises » Using Pythagoras' Theorem » 2006-07-29 19:36:37

Devantè
Replies: 1

Basic Pythagoras' Theorem Excercises

Using Pythagoras' Theorem, can you work out the answers to given problems? These should be quite easy if you know Pythagoras' Theorem. Have fun! smile

1. What is Pythagoras' Theorem? Do not give the formula, explain what it is.
2. The length of the opposite and adjacent sides are 3cm and 4cm. What is the length of the hypotenuse?
3. If I knew what the hypotenuse and what the adjacent OR the opposite side was, what would be the formula for working out the missing side?
4. The length of the adjacent side and the opposite side is 9cm and 11cm. What is the length of the hypotenuse?
5. The length of the opposite and adjacent sides are 19cm and 17cm. What is the length of the hypotenuse?
6. The length of the hypotenuse is 36cm. The length of the opposite side is approximately 7.81cm. What is the length of the adjacent side?
---------------------------------------------------------

#4218 Exercises » The Time » 2006-07-29 19:19:55

Devantè
Replies: 0

Basic Time Exercises

These excercises are based mainly on time. Not a hard subject, but it can be a weak area as careless mistakes on time are usually made in exams. Remember to have fun! smile

1. What is 'Twelve o'clock' in figures?
2. What is the name for 'Twelve o'clock'?
3. Explain the difference between AM and PM.
4. At what time is midnight? Give your answer in AM or PM.
5. How many weeks are there in a fortnight?
6. What century was the year '1847'?
7. How many days are there in 4 leap years?
8. When will the next leap year be?
9. How many decades are there until the year 3000? Give your answer as a whole number.
10. The time is 'Twelve thirty'. What is the angle between both hands, clockwise?
11. Claire watches a TV program at 17:30. Apparently, it is delayed and she has to wait until 17:33 for it to start. How many:
a. Minutes are there between the two times?
b. Seconds are there between the two times?
c. Milliseconds between the two times?
12. What is the difference between a twelve-hour clock and a twenty-four hour clock?
13. A train is supposed to leave at 17:45. It is delayed for 17 minutes. It's journey is 2 hours and 39 minutes long. At what time will it arrive at its destination?
14. A watch is 31 minutes fast. The watch displays 00:28. What is the real time?
15. A watch is 19 minutes and 54 seconds slow. The watch displays 23:59 and 59 seconds. What is the real time?
--------------------------------

#4219 Re: Maths Is Fun - Suggestions and Comments » Our New Forum » 2006-07-29 18:57:42

http://www.mathsisfun.com/numbers/pythagorean-triples.html - Spelling mistake at the bottom of the page, next to the 'Here's More' section. Nothing major though. smile

It says 'Pythagoraen triples - Basics'.

#4220 Re: This is Cool » Pi to a Million Decimal Places! » 2006-07-29 18:46:14

Yeah...maybe there is no way to compose a piece. It would take long hour to recite, but I've recited pi for hours before, and it actually doesn't take that long to recite it. You say to yourself 'hours' and it ends  up being 'half an hour'.

Anyway, yes, I agree with you. smile

#4221 Re: This is Cool » animal languages and communication » 2006-07-29 08:39:50

Nice information. I think what you're saying is actually half true. wink Animals could be making noises meaning something, and not necessarily be relative to speech. An example:

A dolphin makes a wailing noise. It naturally makes this noise, presumably. Now, let's just say that hypothetically, the scientist would see this as a request for food. The dolphin gets the food for making this wailing noise, but then realises that he gets food whenever he makes that wailing noise. This continues and more scientists continue to be led to several conclusions about whether dolphins are attempting to communicate through speech.

Just my theory, though. smile

#4222 Re: Guestbook » Harry Potter » 2006-07-29 08:33:45

Speaking of Harry Potter, has anyone read those variants of Harry Potter books?

"The Ring Of The Ancients, Book 6 of Harry Potter". "Book 7, Wormtail's Revenge". I absolutely love these variants. I read them in a word document, and they were amazing...of course, these were made by fans, but they absolutely fitted with the storyline, all the way. They were actually as good as the real books themselves! These kind of variants (not sure that's the right word to use here... tongue ) are often used to amuse people while waiting for the next Harry Potter book. I think these variants are not only interesting, but I think that they could be published as well. These are no ordinary fan-produced books...and I think they should've been part of the series (in fact I think the Ring Of The Ancients book was better than the Half-Blood Prince!) anyway. If anyone wants to read this, try googling the web for a copy. I'm sure there is one still out there. I doubt you'd be able to find a copy book 'Wormtail's Revenge' lying on a dusty page somewhere on the web, but you might if you're extremely lucky...but anyway, go for the Ring Of The Ancients. It'll be a lot easier to find. wink

#4223 Re: This is Cool » So did you hear they found a new prime number? » 2006-07-29 08:17:45

Wow...a prime number that would fill a park with numbers (that is...if it were a sheet of paper). tongue

What do we do with it, though? I'd like to see someone who has the time and is actually interested in using up their whole life to find a unique pattern of numbers in the 9.1 million digit number.

(I'm kidding, of course tongue )

#4224 Re: This is Cool » Space Travel Near Speed of Light » 2006-07-29 08:14:15

A theory I read in a book somewhere: Travelling just over the speed of light in space will lead to time slowing down in the shuttle itself. That would probably look and feel amazing - And probably scary...?

#4225 Re: This is Cool » Help those in need of friends. » 2006-07-29 08:10:15

I just think it is appauling how people with disabilities are treated...although the behaviour of some people towards people with disabilities is getting better. However, I  have seen quite a few people with disabilities reject an offer to be someone's friend. Some of them feel they do not want friends, and that factor of people with disabilities must be changed as soon as possible (does that make sense? I don't think so tongue ). I don't have any explanation why some people with disabilities act in this way, though. People with disabilities just seem to reject friendship, as if they like being lonely, literally. I think it will be hard to change that...

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