Archive for The Weekly Challenge
{ December 19, 2009 @ 12:00 am }
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{ Problem, The Weekly Challenge }
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You are in a room. You don’t know how you got there. There are two ways to get out. One: A door that leads to life. Two: A door that leads to death. The doors are exactly the same. There is zero difference between the two. The only thing in the room is you and two computers. One: If you ask a question it will tell you the true answer. Two: If you ask a question it will tell you the wrong answer. You only get one question. ONE!!! You don’t know which door is which, and you don’t know which computer is which. How do you get out?
{ November 8, 2009 @ 10:58 pm }
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{ Problem }
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What number comes next in this sequence and why:
0 10 1110 3110 132110 1113122110 ==?==
{ November 6, 2009 @ 1:27 pm }
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{ Solution }
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The Answer :
1 = (5 / 5) x (5 / 5),
2 = (5 / 5) + (5 / 5),
3 = (5 + 5 + 5) / 5,
4 = ((5 x 5) – 5) / 5,
5 = ((5 – 5) / 5 ) + 5,
6 = ((5 x 5) + 5) / 5,
7 = 5 + ((5 + 5) / 5),
8 = (5 – (5 / 5)) / .5,
9 = 5 + 5 – (5 / 5),
10 = 5 + 5 x (5 / 5).
The Winners :
The First
Mohamed Wagdy
The Second
abdullah-adel
The Third
EnasMohey
Then
- 4@
- ahmed said
- Mohammad Rashad
- Shohanda
- Ghada Abdelbaset
- Mohamed Mostafa
And now winners who have simple errors :
- Abu-Bakr Taha
- Muhammad Albedewy
- Omar Mohammad Othman
- sara el_sebaiee
- Ahmed Hussam
- Aya Magdy
- karim ibrahim
- abumuslimamr
- bino
- abdullahnajuib
- Esraa Ibrahim
- Salma H. E. Mostafa
- yasmeena2090
- Ahmed Magdy
Thank you all 
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{ October 31, 2009 @ 12:28 pm }
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{ Problem }
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Using standard mathematical symbols, e.g. +, -, x, etc., rearrange (4) fives to equal the numbers one to ten. For example, 5/5 + 5 – 5 = 1, 5/5 + 5/5 = 2, etc.
Note : you can use decimal point (.) only once.
{ October 29, 2009 @ 11:55 pm }
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{ Solution }
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Answer :
to
The Winners:
The First
Noran
The Second
bino
The Third
EnasMohey
Then
- khaled ahmed
- New
- mona
- Hebatalla
- abdullah adel
- Aya Magdy
{ October 23, 2009 @ 11:00 pm }
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{ Problem }
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Below are 10 skittles in an upside-down triangle shape, can you move the skittles around such that the triangle is the correct way up? You can move any skittle left or right, but, at most, you are only allowed to move three skittles up or down!
{ October 18, 2009 @ 3:30 pm }
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{ Solution }
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Answer:
0: since one of the terms is (x – x).
The Winners
The First
EnasMohey
The Second
Haytham Alaa
The Third
Hebatalla
Then
- marmoor1989
- Noran
- Aya Magdy
- nabil
- khaled ahmed
- the sergeon
{ October 11, 2009 @ 7:07 am }
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{ Problem }
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What does this equation simplify to?
(x – a) * (x – b) * (x – c) * … * (x – z) = ?
{ October 3, 2009 @ 5:52 pm }
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{ Solution }
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Answer
Using Pythagoras’ Theorem:
for the right-angled triangle in the figure
(r – a)2 + (r – b)2 = r2
Now, a = 6 cm and b = 12 cm. So,
(r – 6)2 + (r – 12)2 = r2 or
r2 – 2(6)r + 62 + r2 – 2(12)r + 122 = r2. This simplifies to
r2 – 36r + 180 = 0. On factorizing, we get
(r – 30)(r – 6) = 0.
Thus, the radius of the circle is 30 cm.
Area = 30 * 30 * pi.
The Winners:
The First
Eman Fateen
The Second
New
The Third
Rana
then
- Mohamed Osama
- Rana M
- EnasMohey
- Aya Magdy
- Hebatalla
- Amr Saqr
- Nora Youssef
{ September 26, 2009 @ 10:36 am }
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{ Problem }
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In the above figure, the rectangle at the corner measures 6 cm x 12 cm. What is the area of the circle?
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