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#4276 Re: Maths Is Fun - Suggestions and Comments » Herons' Formula » 2006-07-23 07:12:36
Nice page. It'll probably come in handy when I do an exam. 
#4277 Re: Maths Is Fun - Suggestions and Comments » Speed Count the Blocks » 2006-07-23 07:04:44
36 correct 5 wrong - 2 mins 3 secs
I was kinda not concentrating that time, I'll try again
36 correct, 4 wrong - 1 mins 3 secs
On the third attempt, I got 36 correct and 1 wrong in 1 minute and 50 seconds. I still think it could be improved, though. :\
Great game BTW
UPDATE 21/03/2007: 1 minute and 18 seconds :: 36 correct, 0 wrong.
Go me.
#4278 Re: Maths Is Fun - Suggestions and Comments » Summer Puzzle Fun! » 2006-07-23 06:45:15
This is great MathsIsFun! This'll keep me entertained during the long and boring 6 weeks...relaxing though the holiday may be, it sure is boring since you have nothing to do for 6 weeks!
#4279 Re: Maths Is Fun - Suggestions and Comments » Exercises » 2006-07-23 06:37:33
Thee are some 'basic' topics in the Excercises forum. Is it OK to create 'Advanced' threads, or would it seem silly?
eg. Advanced Addition
#4280 Re: Dark Discussions at Cafe Infinity » Terrorist Attack in London » 2006-07-23 05:59:04
Over a year has passed - There was a two minute silence a few weeks ago in memory of all who died in the London bombing. Such a thing is horrible, and I hope it doesn't happen again! For one, innocent people could die, and two, I live less than a mile away from where the bombings were!
I'm pretty sure it won't happen again though.
#4281 Re: Dark Discussions at Cafe Infinity » Music; what's your song? » 2006-07-23 04:43:24
I'm more of a rock person.
Favourite bands: Dizzy Mizz Lizzy, Coldplay, Mama Cass Eliot, R.E.M, Kaiser Chiefs, Keane, The Editors, Tim Christensen Best Of Soloing
#4282 Re: Jokes » English » 2006-07-23 04:11:53
Yeah...I guess that's just how English is. Sometimes I think that someone just came up with all these phrases, wrote it in a book somewhere and then someone found it, and declared it proper English...just kidding, lol.
But anyway...why would you want to take a dump? Sounds horrible when people say it now that you think of it.
#4283 Re: Dark Discussions at Cafe Infinity » Brown Noise » 2006-07-23 03:35:28
Sorry, didn't remember that. :\
It's a little hard to imagine what the brown note might sound like though, if we cannot hear it...
#4284 Re: Dark Discussions at Cafe Infinity » Brown Noise » 2006-07-23 01:04:43
Yeah, that's true.
Especially for the pizzas...frozen, that is mostly.
#4285 Re: Dark Discussions at Cafe Infinity » Brown Noise » 2006-07-23 00:04:23
Some brown note here: http://www.skyone.co.uk/programmes/brainiac/images/BrownNoiseMP3.mp3
This is quite...odd, like I said before. Didn't do anything to my bowels - People have reported slight loss of breathing. I think I experienced that, but it wasn't serious. You can try it out, and listen to t he whole thing, but don't turn it up too loud. That sound is horrible and irritating...now I kinda half believe the rumours!
#4286 Re: Dark Discussions at Cafe Infinity » Brown Noise » 2006-07-22 22:45:03
Hehe, I guess I'm too used to saying 'brown noise' instead of 'brown note'.
But anyway, I'll try that, thanks.
I think it was 92 octaves below normal F#?
#4287 Exercises » Basic Decimals » 2006-07-22 19:55:59
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- Replies: 1
Basic Decimal Excercises
Easy decimals in here - Well not easy, basic. Not too complex...just do your best. Remember to have fun and take your time!
1. What is a half written as a decimal?
2. What is 0.5 x 0.6?
3. I have eaten 99.05% of a bar of chocolate. How much is left?
4. What is 0.5 / 30 to 3 decimal places?
5. What is 5/16 x 2/7? Simplify your answer, then write it as a decimal to 3 decimal places.
6. Arrange these decimals in descending order: 0.252, 0.522, 0.225, 0.0252, 0.552, 0.255.
7. Write thirty-one tenths as a decimal. Multiply your result by 0.25.
8. I ate 3 pieces of cake. There are 5 pieces left. Half of the 5 pieces of cake were not good to eat. How much of it was good to eat? How much had I eaten in the first place? Write your two answers as decimals.
9. What is 0.1 x 0.1?
10. What is 0.5 cubed?
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#4288 Re: Dark Discussions at Cafe Infinity » Brown Noise » 2006-07-22 19:20:36
That's true - A lot of people are interested in the part that causes humans to lose controls of their bowels!
But anyway, I'd like to know where I can get access to the brown note via the internet. I would like to do some testing with *cough*humans*cough* on how they react to it, and how changing the volume etc. has an effect on it. However, I do believe that brown noise can be a little dangerous. People have reported to have not needed to go to the toilet, but they have reported to have a horrible uneasy feeling in their bowels/stomach, and they seem to have not been able to get rid of it for hours.
Just out of interest - Has anyone ever actually witnessed the brown note?
#4289 Re: Puzzles and Games » Chess problems collection » 2006-07-22 18:42:41
Nice find - Good to practice.
#4290 Dark Discussions at Cafe Infinity » Brown Noise » 2006-07-22 09:13:43
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- Replies: 10
Brown noise is an odd noise..but does it really do what it says it does?
Personally I've never tried it, but I've listened to it on the TV. The TV affects some of the sound though so broadcasting it won't have much effect. People have reported to have uneasy feelings in their stomachs, and wanting to go to the bathroom but they can't. I don't know if this is true, but there's always those who are brave enough to try it...
More info here: http://en.wikipedia.org/wiki/Brown_note
Interesting article. Especially the bottom paragraph at the bottom of the page. Any thoughts on this?
#4291 Re: Dark Discussions at Cafe Infinity » The Cure for Information Overload » 2006-07-22 08:45:06
I wonder if one person did it all...?
#4292 Re: Dark Discussions at Cafe Infinity » Any musicians? Take a look here » 2006-07-22 08:28:20
If this applies to the UK, I'd be interested.
#4293 Re: Dark Discussions at Cafe Infinity » Happy Pi Approximation Day » 2006-07-22 07:36:32
Didn't realise...a day hard to remember. That is, unless you're a computer or a robot that can store the value of 22/7. Nice find.
#4294 Re: Maths Is Fun - Suggestions and Comments » Analog and Digital Clock Animation » 2006-07-22 07:32:22
Very nice - Works for me!
#4295 Exercises » Basic Mean, Median, Mode and Range » 2006-07-22 06:24:22
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- Replies: 1
Basic Mean, Median, Mode and Range Excercises
As the title states - This is basic mean, median, mode and range. Which means these shouldn't be at all to hard. Have fun!
1. Which measure of average (the mean, the median, or the mode) requires you to put the data in numerical order?
2. Which measure of average (the mean , the median , or the mode ) can have more than one value?
25, 21, 12, 14, 8, 19, 17, 12
3. Mean of set of numbers =
4. Median of set of numbers =
5. Mode of set of numbers =
6. Range of set of numbers =
Number of people Frequency
1 15
2 6
3 3
4 1
5 0
7. Mean of set of numbers =
8. Median of set of numbers =
9. Mode of set of numbers =
10. Range of set of numbers =
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#4296 Exercises » Basic Primes, Factors and Multiples » 2006-07-22 03:01:49
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Basic Prime, Factor and Multiple Excercises
Based on prime numbers, factors, and multiples. You might find something like these in your exams, but there is always that goodness of building up your mental skills. Have fun!
1. Write as a product of primes 18.
2. Write as a product of primes 48.
3. Write as a product of primes 96.
4. Find the highest common factor of 24 and 30.
5. Find the highest common factor of 48 and 60.
6. Find the highest common factor of 72 and 40.
7. Find the lowest common multiple of 24 and 30.
8. Find the lowest common multiple of 36 and 60.
9. Find the lowest common multiple of 32 and 40.
10. Find the lowest common multiple of 27 and 36.
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#4297 Exercises » Surds » 2006-07-22 02:54:18
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- Replies: 1
Surds Excercises
Ah...surds. Fun to work through, like algebra. Anyway, you should know how to do these - These don't have long surds like 'root 2097152' or 'root 97485492141'. They're more like 'root 147'...that kind. Have fun solving these!
1. Simplify 'root 18'.
2. Simplify 'root 72'.
3. Simply 'root 18' + 'root 72'.
4. Simplify 'root 45' + 'root 80'.
5. Simplify 'root 18' multiplied by 'root 6'.
6. Simplify 'root 48' over 'root 12'.
7. Simplify 'root 32' over 'root 6'.
8. Simplify ('root 18' ÷ 'root 72') over 'root 8'.
9. Simplify '4' over ('root 8' ÷ 'root 2').
10. Simplify '16' over ('root 20' ÷ 'root 12').
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#4298 Exercises » Graphs of Sinx, Cosx and Tanx » 2006-07-21 19:14:16
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Graphs of Sinx, Cosx and Tanx Excercises
This is mainly about the graphs of sinx, cosx and tanx. You're likely to get this in your exams - But still, remember to have fun!
In questions 1-5 you will be given a sketch graph. State which of the following equations (A - J) correctly describes the graph.
A y = ½sinx°
B y = ½sin2x°
C y = (1/3)cosx°
D y = 3cosx°
E y = 2sin2x°
F y = sin½x°
G y = 2sin½x°
H y = sin2x°
I y = cos3x°
J y = (1/3)cosx°
1. A, B, C, D, E, F, G, H, I or J?
2. A, B, C, D, E, F, G, H, I or J?
3. A, B, C, D, E, F, G, H, I or J?
4. A, B, C, D, E, F, G, H, I or J?
5. A, B, C, D, E, F, G, H, I or J?
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#4299 Re: Exercises » About the Exercises » 2006-07-21 19:00:13
And three cheers for MathsIsFun, who made this forum under the title of 'Exercises'!
I will try to make as much as I can - But sooner or later, I'll start running out of ideas for subjects...
#4300 Exercises » Trigonometry » 2006-07-21 18:57:39
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Trigonometry Excercises
There are some fairly straight forward questions in this thread, all to do with Trigonometry. Don't panic if you can't solve them - These aren't supposed to be in a 'forced order'...you may do them in any order as you wish.
Questions 1-3 refer to the diagram below.
1. Which side is opposite angle P?
2. Which side is adjacent to angle Q?
3. Which side is the hypotenuse?
In questions 4-6, state which of the following formulae ( a , b or c ) you would use to solve the problem.
4. Find XZ.
5. Find QR.
6. Find angle J.
In questions 7-10, calculate the required side or angle, giving your answers correct to 3 s.f.
7. Find AC.
8. Find angle P.
9. Find XY.
10. Find the length of the hypotenuse.
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