A math puzzle of Chinese primary school
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The length of a troop column is 100m. It's moving forward in a beeline. A batman runs from the tail to the head and then back to the tail. Now the troop moves 100m. Suppose the speed of the troop and the batman are both fixed. ASK: What is the length of the batman runs? My answer is 241.42m. Is it right?
Let's roll!
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The length of a troop column is 100m. It's moving forward in a beeline. A batman runs from the tail to the head and then back to the tail. Now the troop moves 100m. Suppose the speed of the troop and the batman are both fixed. ASK: What is the length of the batman runs? My answer is 241.42m. Is it right?
Let's roll!
Yep - I got 241.42 too 100 + sqr_root(5000) * 2 :-)
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The length of a troop column is 100m. It's moving forward in a beeline. A batman runs from the tail to the head and then back to the tail. Now the troop moves 100m. Suppose the speed of the troop and the batman are both fixed. ASK: What is the length of the batman runs? My answer is 241.42m. Is it right?
Let's roll!
I have long forgotten my maths. :| EastDragon wrote: What is the length of the batman runs Batman either flys in the air or drives in a batmobile. You seldom see him on foot really. :laugh: Weiye Chen Life is hard, yet we are made of flesh...
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The length of a troop column is 100m. It's moving forward in a beeline. A batman runs from the tail to the head and then back to the tail. Now the troop moves 100m. Suppose the speed of the troop and the batman are both fixed. ASK: What is the length of the batman runs? My answer is 241.42m. Is it right?
Let's roll!
Well - I'd say he simply runs 200meters. He starts at the tail of the column, and then runs to the head, and then runs back to the tail again, right? The added distance the column moves forward when "batman" runs to the head would be equal to the shorter distance he needs to run back again since the speed is constant. Am I totally off base here? Edit: Hmm - forgetting about the factor that when he runs back the column is still moving forward, which means he has to run even shorter to get back to the tail of the column.... --------------------------- 127.0.0.1 - Sweet 127.0.0.1
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The length of a troop column is 100m. It's moving forward in a beeline. A batman runs from the tail to the head and then back to the tail. Now the troop moves 100m. Suppose the speed of the troop and the batman are both fixed. ASK: What is the length of the batman runs? My answer is 241.42m. Is it right?
Let's roll!
Do Chinese maths questions usually use the military as subjects. In the UK our questions usually involve trains or shopping ;-) Michael CP Blog [^] Development Blog [^]
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The length of a troop column is 100m. It's moving forward in a beeline. A batman runs from the tail to the head and then back to the tail. Now the troop moves 100m. Suppose the speed of the troop and the batman are both fixed. ASK: What is the length of the batman runs? My answer is 241.42m. Is it right?
Let's roll!
The answer is 200 as already stated. Since the line is moving 100 meters forward and is 100 meters long, then at the end, the last man will be where the first man started. When Batman reaches the front of the line, the line has already moved x meters forward. That means there are 100-x meters back to the start. For Batman to reach the start of the line x meters forward, he has already run 100+x meters. So we have Batman running 100+x meters to get to the start and 100-x to get back to the end. 100+x + 100-x = 200. Tim Smith I'm going to patent thought. I have yet to see any prior art.
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The length of a troop column is 100m. It's moving forward in a beeline. A batman runs from the tail to the head and then back to the tail. Now the troop moves 100m. Suppose the speed of the troop and the batman are both fixed. ASK: What is the length of the batman runs? My answer is 241.42m. Is it right?
Let's roll!
Assume you are in the rest frame of the troops. Since we are moving much slower then the speed of light we can ignore special relativity. Therefore all distances are the same in all reference frames. Batman runs 100m up and 100m back.
I can imagine the sinking feeling one would have after ordering my book, only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon
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The length of a troop column is 100m. It's moving forward in a beeline. A batman runs from the tail to the head and then back to the tail. Now the troop moves 100m. Suppose the speed of the troop and the batman are both fixed. ASK: What is the length of the batman runs? My answer is 241.42m. Is it right?
Let's roll!
...doesn't anyone read anything besides comic books anymore? ;P Why does a Chinese person have a better grasp of the English language than a bunch of presumably highly educated native english speaking programmers? http://en.wikipedia.org/wiki/Batman_(army)[^]
"A preoccupation with the next world pretty clearly signals an inability to cope credibly with this one."
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The answer is 200 as already stated. Since the line is moving 100 meters forward and is 100 meters long, then at the end, the last man will be where the first man started. When Batman reaches the front of the line, the line has already moved x meters forward. That means there are 100-x meters back to the start. For Batman to reach the start of the line x meters forward, he has already run 100+x meters. So we have Batman running 100+x meters to get to the start and 100-x to get back to the end. 100+x + 100-x = 200. Tim Smith I'm going to patent thought. I have yet to see any prior art.
Not correct, Tim :-) 241.42 is the right answer. It is a typical quadratic equation problem.
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...doesn't anyone read anything besides comic books anymore? ;P Why does a Chinese person have a better grasp of the English language than a bunch of presumably highly educated native english speaking programmers? http://en.wikipedia.org/wiki/Batman_(army)[^]
"A preoccupation with the next world pretty clearly signals an inability to cope credibly with this one."
John Cardinal wrote: Why does a Chinese person have a better grasp of the English language than a bunch of presumably highly educated native english speaking programmers? :-D
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...doesn't anyone read anything besides comic books anymore? ;P Why does a Chinese person have a better grasp of the English language than a bunch of presumably highly educated native english speaking programmers? http://en.wikipedia.org/wiki/Batman_(army)[^]
"A preoccupation with the next world pretty clearly signals an inability to cope credibly with this one."
- A lot of us don't have experience with army life. 2) A lot of us aren't British 3) The "wrong" use is much more common
Ave Shog9, CP-addicti te salutant! - K(arl), The Soapbox
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...doesn't anyone read anything besides comic books anymore? ;P Why does a Chinese person have a better grasp of the English language than a bunch of presumably highly educated native english speaking programmers? http://en.wikipedia.org/wiki/Batman_(army)[^]
"A preoccupation with the next world pretty clearly signals an inability to cope credibly with this one."
John Cardinal wrote: doesn't anyone read anything besides comic books anymore? :wtf:READ!:wtf:! Are you insane?!? Everything I learned I learned from TV.
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03 "Obviously ??? You're definitely a superstar!!!" - mYkel - 21 Jun '04 "There's not enough blatant self-congratulatory backslapping in the world today..." - HumblePie - 21 Jun '05 Within you lies the power for good - Use it!
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Not correct, Tim :-) 241.42 is the right answer. It is a typical quadratic equation problem.
Yeah, I got my signs reversed. Silly me. The problem is that for the life of me I can't figure out where 5000 came from. *sigh* And I have a BS in Math. But I always sucked at word problems. :laugh: Tim Smith I'm going to patent thought. I have yet to see any prior art.
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...doesn't anyone read anything besides comic books anymore? ;P Why does a Chinese person have a better grasp of the English language than a bunch of presumably highly educated native english speaking programmers? http://en.wikipedia.org/wiki/Batman_(army)[^]
"A preoccupation with the next world pretty clearly signals an inability to cope credibly with this one."
Clue alert, of course they weren't talking about "Batman". 10 seconds of thought would make that obvious. Thus the whole point of going to the trouble of capitalizing "Batman" to continue the joke. Tim Smith I'm going to patent thought. I have yet to see any prior art.
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Do Chinese maths questions usually use the military as subjects. In the UK our questions usually involve trains or shopping ;-) Michael CP Blog [^] Development Blog [^]
how funny - based on your response i wonder about Maths in Australia - perhaps kangaroos ~Alexander Kent
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...doesn't anyone read anything besides comic books anymore? ;P Why does a Chinese person have a better grasp of the English language than a bunch of presumably highly educated native english speaking programmers? http://en.wikipedia.org/wiki/Batman_(army)[^]
"A preoccupation with the next world pretty clearly signals an inability to cope credibly with this one."
Function Batman()[^] :-D David
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how funny - based on your response i wonder about Maths in Australia - perhaps kangaroos ~Alexander Kent
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From what I remember at school it was more like 'if there are 300 tourists swimming at Bondi beach and sharks eat 32% of them, how many are left?'
Josh Gray wrote: tourists swimming at Bondi beach and sharks eat 32% of them Hey Bondi Beach, I was there in Sydney!! and no, I wasn't eaten by a shark! :) -- LuisR
Luis Alonso Ramos Intelectix - Chihuahua, Mexico Not much here: My CP Blog!
