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#76 Re: Exercises » Selected Olympiad Questions! » 2010-06-25 07:35:22
Seems like one day you'll be able to work upon them blindfolded! 
3. Which is greater?
#77 Puzzles and Games » Catch Me If You Can! » 2010-06-25 07:22:01
- ZHero
- Replies: 39
I'll be posting some puzzles (sort of) that i'll work upon all by myself! Catch me if you can!!
1. What's the missing term?
1.20 , 5.60 , ? , 15.16 , 21.22
(hint: α β )
#78 Re: Introductions » Problem#3 Grade 11 Geometry » 2010-06-24 17:28:40
ADC∼CDB
AD/AC = CD/CB
x/6 = √(6² - x²)/8
Solve for 'x'
#79 Re: Introductions » Geometry: grade 11 problem#4 » 2010-06-24 17:23:08
BC = √(4² + 6²) = 10
Let AB = x
10² + x² = (6 + √(x² - 4²))²
Solve for 'x'
#80 Re: Introductions » Problem#2 Grade 11 Geometry » 2010-06-24 17:15:42
∠ACB=∠ECD
∠CAB=∠CED
Hence, the third angles must also be equal...
∠ABC=∠EDC
∴ AAA or (AA)
#81 Re: Introductions » Geometry: grade 11 problem#1 » 2010-06-24 17:11:08
∠ ACB = ∠ DCE (vertically oppsite ∠s)
AC/DC = BC/EC = 1/2 (given)
∴ ACB∼DCE (SAS similarity)
∴ ∠ABC = ∠DCE
AB||DE (alternate angles are equal)
#82 Re: Exercises » Selected Olympiad Questions! » 2010-06-24 17:04:40
mathsyperson: you saw it through again!
#83 Re: Exercises » Selected Olympiad Questions! » 2010-06-24 17:03:13
phrontister: UNIQUE! It took me a while understanding why you divided the power of 10 by a 9 but got it now! Comps must be your Favorite Toys!! 
#84 Re: Introductions » Wow... Hi! ^.^ » 2010-06-24 16:56:48
Yes! The forward slashes "" can either be used to separate "terms", to introduce "single space" or to use "special symbols".
Like...
Here's a Brief Tutorial on LaTeX at http://www.mathisfunforum.com/viewtopic.php?id=4397
Here's a List of some Symbols: LaTeX-Symbols
#85 Re: Exercises » Selected Olympiad Questions! » 2010-06-23 18:36:13
mathsyperson: WOW!! Catchy!
2.
#86 Exercises » Selected Olympiad Questions! » 2010-06-23 06:24:45
- ZHero
- Replies: 25
1. A 50-digit natural number is completely divisible by 13. If all the digits, except the 26th digit, are 1 then find the 26th digit.
#90 Re: Jokes » Chemistry » 2010-06-16 20:43:47
Q: What weapon is made of Potassium, Nickel and Iron?
A:
#92 Re: This is Cool » Prime Numbers!! » 2010-06-14 22:56:12
This one's startling and was known to Diophantus in the third century. It was explored further by Fermat, and then by Euler and Gauss and subsequently by others.
Prime Series → 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 ...
Now delete all numbers which are 1 less than a multiple of 4 (i.e. 3, 7, 11 etc.)
New Series → 2, 5, 13, 17, 29, 37, 41, 53, 57, 61, 73 ...
Every Prime Number of this New Series is the Sum of Two Squares in a Unique Way!
e.g. 2=1²+1²
5=1²+2²
13=2²+3²
17=1²+4²
29=2²+5² and so on...
This extraordinary fact is related to Pythagorass theorem about the sides of a right-angled triangle!
#93 Re: Help Me ! » Help with solving an analytic problem... » 2010-06-14 07:00:10
Let the point A be (0, 0), i.e. origin, and lets say that they meet at a point C (b, k)
AC=2BC
√(b²+k²)=2k
b²+k²=4k²
k=b/√3
they meet at C (b, b/√3) and AC is 30 degrees inclined from the X-axis.
#94 Re: Jokes » Silly Questions Funny Answers! » 2010-06-06 23:56:56
I don't understand the first one. That is not based on the fact that it is about my country.
#97 Re: Jokes » Silly Questions Funny Answers! » 2010-06-05 23:07:29
Q: What do you get if you cross an Elephant and a Kangaroo?
A:
Q: What has one horn and gives milk?
A:
Q: What is the Center of Gravity?
A:
Q: What needs to be broken before it can be used?
A:
Q: What has no beginning, no middle or no end?
A:
Q: What is in the Middle of Nowhere?
A:
#98 Re: This is Cool » AI to detect celebrity you're thinking of » 2010-06-05 22:53:20
I found this → Guess The Number.
#99 Re: Jokes » Silly Questions Funny Answers! » 2010-06-05 17:25:23
Did i say "I'm Sorry"?
Oh wel.. I did.
I'm Sorry!