Not a Puzzle

Google Phone is winner already

Google Search, Google Maps, Google News, Google Video, Google Groups, Google Image Search, Google Directory, Google Earth, Google Desktop , Google Blogger, Google Scholar, Google Book Search, Gmail, Google Finance, Google Page Creator, Google Docs & Spreadsheets, Google Answers, Picasa, Google Web Accelerator, Google SketchUp, Google Base, Google Moon, Google Gears, Orkut, Google Calendar, Youtube, Google Translator, Google Analytics, Google Checkout, Google Talk, Google Transliteration, Google Sky, Google Web Toolkit, Google Wifi, Google Adwords/ Adsense...................... list goes on and on and on

All these services in one device, a device which is ABSOLUTELY a HIT before even coming to the market.

so my theory says, Gphone > all Phones > iPhone

Guess the Number

I have a natural number which has the following properties:

(1) Each of the 10 digits (0 to 9) appears exactly once in the number.
(2) For each pair of digits whose sum is 9, the number of other digits positioned strictly between the pair is equal to the smaller digit of the pair.
(3) The sum of each pair of digits positioned at the same distance from opposite ends of the number is a prime number.
(4) The difference between any 2 adjacent digits is greater than 1.
(5) The number is a multiple of the number of digits in the number.

What number am I talking about? This number is unique; there is only one answer to this question.

Equal Sums

A B C
---. D
G F E
H
I

Each of the digits 1,2,3,4,5,6,7,8, and 9 is:
[1] Represented by a different letter from A to I. (Not necessarily in same order)
[2] Each of A+B+C, C+D+E, E+F+G, and G+H+I is equal to 13.
Which digit does E represent?
{Level-Medium}

Old Coin Puzzle

You blindfolded and let into a room. The room has an infinitely many coins scattered around on the floor. your friend tells you that that 20 of these coins are tails and the rest are heads. He also says that if you can divide the coins into 2 piles where the number of tails is the same in both piles, then you win all of the coins. You are allowed to move the coins and to flip them over, but you can never tell what state a coin is currently in (the blindfold prevents you from seeing, and you cannot tell by feeling it). How do you go about partitioning the coins so that you can win all of them?

difficulty:medium

Open or closed?

A high school has a very strange principal. On the first day, he has his students perform an odd opening day ceremony

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Rules

1. The correct answer should be posted atleast 2 days after the date of posting of the puzzle so that others who have not answered can get a chance too.
2. A person should be limited to one puzzle per three days and he must not post a new one immediately after the previous one is solved; he must wait for more two days. However others can post a puzzle the next day.

What do you say about this?

P.S. What I mean is that the person posting the question shall reveal the answer as a comment after 2 days. Meanwhile, however, the others are free to answer as many times as they want. But, the one correctly answering the question first will get the points.

My Secret Word

One of the words listed below is my secret word.

AIM DUE MOD OAT TIE

With this list in front of you, if I were to tell you any one letter of my secret word, then you would be able to tell me the number of vowels in my secret word.

Which word is my secret word?

{Level-Medium}

After-Dinner Drink

Abigail, Bridget, and Claudia often eat dinner out.
[1] Each orders either coffee or tea after dinner.
[2] If Abigail orders coffee, then Bridget orders the drink that Claudia orders.
[3] If Bridget orders coffee, then Abigail orders the drink that Claudia doesnt order.
[4] If Claudia orders tea, then Abigail orders the drink that Bridget orders.
Who do you know always orders the same drink after dinner?
{Level-Medium}

The Tennis Players

Zita, her brother, her daughter, and her son are tennis players. As a game of doubles is about to begin:
[1] Zita's brother is directly across the net from her daughter.
[2] Her son is diagonally across the net from the worst player's sibling.
[3] The best player and the worst player are on the same side of the net.
Another Simple question-Who is The Best Player?
{Level-Medium}

Have a look please:

1)I have given all of you the administrator rights.
2)I recommend that a new puzzle should only be posted after the previous one is solved or 2 days after the post of the previous puzzle(which ever is earlier). "Everyday puzzle" will consume a lot of time and might prove harmful!