Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#76 Re: Exercises » Combinatorics - Rearranging Words » 2007-09-19 01:06:05
Well, the questions are quite simple, I must say. 
#78 Re: Help Me ! » Need ideas!! » 2007-09-19 00:51:29
Or very very very very complex Permutation and Combination.... I hate those lot's of calculation especially when you have to do factiorials (!)!!
#79 Re: This is Cool » Geometry problem » 2007-09-18 00:41:10
That may be of some use.
#80 Re: This is Cool » K'nex logic gates » 2007-09-17 23:52:44
Interesting, simple, logical and I can see you put in alot of effort. Good work!
#81 Re: Dark Discussions at Cafe Infinity » Talk Like A Pirate Day (Sep 19) » 2007-09-17 23:32:56
ye's gotta good suggestion, mate! Try't outanow howbout't?
#82 Re: Puzzles and Games » let's make a rainbow!! » 2007-09-17 23:29:50
Yeah!! This is totally fun!
#83 Re: Jai Ganesh's Puzzles » Permutations and Combinations » 2007-09-17 23:24:43
Which is 90, same I suppose 
#84 Re: Help Me ! » Need ideas!! » 2007-09-17 00:07:02
Fear not, for this is the 'Help Me!' Section, right?
#85 Re: Puzzles and Games » let's make a rainbow!! » 2007-09-17 00:05:56
hey! It worked out!
P.S. Remove your P.S.
#86 Re: Help Me ! » i want to get a head start on... » 2007-09-16 23:59:16
how about Tommy Almighty? Sounds better than luightning almighty...
#87 Re: Puzzles and Games » let's make a rainbow!! » 2007-09-16 23:55:36
heheh, consider editing yours too, lightning! 
#88 Re: Help Me ! » i want to get a head start on... » 2007-09-16 23:54:37
'^' simply means to the power of, mathematically, that is.
#89 Re: Help Me ! » i want to get a head start on... » 2007-09-16 23:49:16
nope, but 3^4=3*3*3*3=9*9=9*3*3=27*3=81
#90 Re: Puzzles and Games » let's make a rainbow!! » 2007-09-16 23:47:10
Ok, maybe you didn't break it
#91 Re: Help Me ! » i want to get a head start on... » 2007-09-16 23:45:51
4*3=12
#92 Re: Jai Ganesh's Puzzles » Permutations and Combinations » 2007-09-16 23:22:02
PC # 5
The figures 4, 5, 6,7, and 8 are written in every possible order. How many of the numbers so formed will be greater than 56,000?
First, find ALL the combinations
Since the formula is
where r is
(the number of positions)-1
so now we see: combinations which don't accept 4's at the start and 54's.
and we have:
Done
#94 Re: This is Cool » Do you want to participate in a competition? » 2007-09-16 23:10:15
Quote:" He showed no signs of any anger, he was being very calm. "
A.R.B
Calm Anger! still rots the Inside!..............................................................................................................................................
Hidden anger! Rots the inside the most!......................................... (I don't want to put too many dots, and no, I haven't lost my mind) 
#95 Re: Maths Is Fun - Suggestions and Comments » Algebra - Basic Definitions » 2007-09-16 23:08:07
To me, who has only basic and I mean BASIC knowledge in algebra, it's quite good.
#96 Re: Help Me ! » Need ideas!! » 2007-09-16 19:08:23
So, does that mean I am right?
I think so, if not, what else could it be? 
#97 Re: Puzzles and Games » let's make a rainbow!! » 2007-09-16 19:02:44
haha +_+"
#98 Re: Maths Is Fun - Suggestions and Comments » Polynomials » 2007-09-16 18:56:18
Oh, thanks. You see, I've never studied 'polynomials' (the term)
#99 Re: Help Me ! » Need ideas!! » 2007-09-16 01:21:55
The first to guess it. (or even want to)
#100 Re: Help Me ! » Need ideas!! » 2007-09-16 01:15:06
I don't think so, logic problems can become very difficult if you allow sufficient restrictions. By the way, in Australia you learn trigonometry and quadratics in Grade 8, and that's only if you're in an enhancement class.
I assume that volume has been covered, so how about investigating filling polyhedrons with water? Water could be poured in at a certain rate, and you have to find how high it will be after a certain time. You could have irregular polyhedrons, such as cubes stacked on top of spheres. You could also graph the rates at which they fill etc.
If its convenient, you migh also like to try a problem in statistics. You could go out and survey people about things like how much homework they do, compile your results, find the mean, median, range etc.. of your results, and graph them using different methods. Try to find correlations between different types of data, in the end try to draw conclusions about your findings.
Or maybe something related to pricing. You could analyse different deals available for a certain item and decide which one is the best. If you have covered interest you could incorporate that too. You could do a similar thing for wages when applying for a job.
In Singapore, students learn that at age 11 or 12...