My Top 10 Aussie Gripes
May 28th 2006, 12:33 pm
#406
Australia's Doorman
Joined: Jan 2005
Location: The Shoalhaven, New South Wales, Australia
Posts: 11,056
Re: My Top 10 Aussie Gripes
You have in supply an infinite number of ping-pong balls. In front of you is a barrel, of infinite volume, into which you throw the balls. Each ball is labelled by a natural number, lined up in such an order. There is one ping-pong ball for each natural number. You first throw in ball 1, then ball 2, then ball 3, etc. After you throw in ball 10, you remove ball 1 from the barrel. After ball 20, you remove ball 2. After you throw in ball 30, you take out ball 3, and so on. This experiment lasts a duration of one minute. For the first 30 seconds, you throw in the first 10 balls, after which point there are 9 balls left in the barrel. For half of that time -- 15 seconds -- you throw in the next 10 balls (ball 11 through ball 20), after which there are 18 balls remaining in the barrel. In the next 7.5 seconds, you throw in the next ten, after which there are 27 balls remaining in the barrel, and so on. After a minute, the experiment ends, and you take note. The question is as follows: At the end of the experiment, how many ping-pong balls are in the barrel?
May 28th 2006, 12:38 pm
#407
Fighting my corner
Joined: Aug 2005
Location: Adelaide, South Australia
Posts: 11,948
Re: My Top 10 Aussie Gripes
Originally Posted by Hutch
You have in supply an infinite number of ping-pong balls. In front of you is a barrel, of infinite volume, into which you throw the balls. Each ball is labelled by a natural number, lined up in such an order. There is one ping-pong ball for each natural number. You first throw in ball 1, then ball 2, then ball 3, etc. After you throw in ball 10, you remove ball 1 from the barrel. After ball 20, you remove ball 2. After you throw in ball 30, you take out ball 3, and so on. This experiment lasts a duration of one minute. For the first 30 seconds, you throw in the first 10 balls, after which point there are 9 balls left in the barrel. For half of that time -- 15 seconds -- you throw in the next 10 balls (ball 11 through ball 20), after which there are 18 balls remaining in the barrel. In the next 7.5 seconds, you throw in the next ten, after which there are 27 balls remaining in the barrel, and so on. After a minute, the experiment ends, and you take note. The question is as follows: At the end of the experiment, how many ping-pong balls are in the barrel?
May 28th 2006, 1:09 pm
#408
Forum Regular
Joined: May 2003
Location: Bagworth, Leics. UK
Posts: 270
Re: My Top 10 Aussie Gripes
Originally Posted by Hutch
You have in supply an infinite number of ping-pong balls. In front of you is a barrel, of infinite volume, into which you throw the balls. Each ball is labelled by a natural number, lined up in such an order. There is one ping-pong ball for each natural number. You first throw in ball 1, then ball 2, then ball 3, etc. After you throw in ball 10, you remove ball 1 from the barrel. After ball 20, you remove ball 2. After you throw in ball 30, you take out ball 3, and so on. This experiment lasts a duration of one minute. For the first 30 seconds, you throw in the first 10 balls, after which point there are 9 balls left in the barrel. For half of that time -- 15 seconds -- you throw in the next 10 balls (ball 11 through ball 20), after which there are 18 balls remaining in the barrel. In the next 7.5 seconds, you throw in the next ten, after which there are 27 balls remaining in the barrel, and so on. After a minute, the experiment ends, and you take note. The question is as follows: At the end of the experiment, how many ping-pong balls are in the barrel?
Now where did I put that glass
and are there any chops left on the barbie!!!
May 28th 2006, 2:01 pm
#409
Account Closed
Joined: Jun 2005
Posts: 9,316
Re: My Top 10 Aussie Gripes
Originally Posted by Hutch
You have in supply an infinite number of ping-pong balls. In front of you is a barrel, of infinite volume, into which you throw the balls. Each ball is labelled by a natural number, lined up in such an order. There is one ping-pong ball for each natural number. You first throw in ball 1, then ball 2, then ball 3, etc. After you throw in ball 10, you remove ball 1 from the barrel. After ball 20, you remove ball 2. After you throw in ball 30, you take out ball 3, and so on. This experiment lasts a duration of one minute. For the first 30 seconds, you throw in the first 10 balls, after which point there are 9 balls left in the barrel. For half of that time -- 15 seconds -- you throw in the next 10 balls (ball 11 through ball 20), after which there are 18 balls remaining in the barrel. In the next 7.5 seconds, you throw in the next ten, after which there are 27 balls remaining in the barrel, and so on. After a minute, the experiment ends, and you take note. The question is as follows: At the end of the experiment, how many ping-pong balls are in the barrel?
May 28th 2006, 2:47 pm
#410
Home and Happy
Joined: Dec 2002
Location: Keep true friends and puppets close, trust no-one else...
Posts: 93,809
Re: My Top 10 Aussie Gripes
Hmmm....who can guess my next two lines....
First - why was the thread revived?
Secondly - all together now - its way off topic
Night night thread
First - why was the thread revived?
Secondly - all together now - its way off topic
Night night thread
