Mathematical Thinking I, II, .... (previously Puzzle: Marrie
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Mathematical Thinking I, II, .... (previously Puzzle: Marrie
A little mathematical one...
In a certain town, 5/7 of the men are married to 3/8 of the women. What fraction of the adult population is married? Assume monogamy.
(Edit: topic title changed)
In a certain town, 5/7 of the men are married to 3/8 of the women. What fraction of the adult population is married? Assume monogamy.
(Edit: topic title changed)
Last edited by ayw on April 13th, 2009, 7:34 am, edited 1 time in total.
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Re: Puzzle: Married?
51/56 ??
well, this is false, or? but this is the only solution I can think of now, well, I'm a little bit tired, so...
Say, false or true?
well, this is false, or? but this is the only solution I can think of now, well, I'm a little bit tired, so...
Say, false or true?
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Re: Puzzle: Married?
@akai-kun, false but judging from your answer, you might be on the right track. It's slightly tricky, but elementary fractions.
I thought I saw a reply by x64_02 that was correct.. where's it gone?
I thought I saw a reply by x64_02 that was correct.. where's it gone?
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Re: Puzzle: Married?
Spoiler:
Last edited by akai-kun on April 13th, 2009, 6:07 am, edited 1 time in total.
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Re: Puzzle: Married?
I'm pretty sure you got it. Can you give me the exact fraction (in spoilers)?akai-kun wrote:Spoiler:
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Re: Puzzle: Married?
Really? Yeah!!ayw wrote:I'm pretty sure you got it. Can you give me the exact fraction (in spoilers)?akai-kun wrote:Spoiler:
Well, the fraction( not sure if it is mathematical correct, but...):
Spoiler:

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Re: Puzzle: Married?
Hmm... you got nearly the right result, and rounding down to two digits gives the right answer. Your first step
is correct and is very important but I can't follow the maths beyond that. The final fractionakai-kun wrote:Spoiler:
is not correct. Hint:akai-kun wrote:Spoiler:
Spoiler:
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Re: Puzzle: Married?
Well, yeah, you're right... Variables would be better and from what I understand, what you wrote was my calculation...ayw wrote: Hmm... you got nearly the right result, and rounding down to two digits gives the right answer. Your first stepis correct and is very important but I can't follow the maths beyond that. The final fractionakai-kun wrote:Spoiler:is not correct. Hint:akai-kun wrote:Spoiler:Spoiler:
And the last step?
Well, this is the calculation I wanted to show:
right or not? (...)cancerkani wrote: Just for fun... Not sure if this is right...Spoiler:
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Re: Puzzle: Married?
@akai-kun, Ah, then you were correct!Sorry about that. Well done!!
@cancerkani, Thats right, although Well done!!
@cancerkani, Thats right, although
Spoiler:
Last edited by ayw on April 13th, 2009, 7:10 am, edited 1 time in total.
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Re: Next Puzzle/Quiz!
Next quiz!
I think we could make a game like in other threads/forums that the one who anwered the question at first can start a new quiz, how about that idea? (But it should be with maths...)
And if you like, here's the next quiz(easy one):
"The sum of two positive rational numbers is 15.
For which two numbers the product of them is at the highest point?
Does the result change when the numbers also could be negative? Explain your answer!"
Good luck!
I think we could make a game like in other threads/forums that the one who anwered the question at first can start a new quiz, how about that idea? (But it should be with maths...)
And if you like, here's the next quiz(easy one):
"The sum of two positive rational numbers is 15.
For which two numbers the product of them is at the highest point?
Does the result change when the numbers also could be negative? Explain your answer!"
Good luck!
Last edited by akai-kun on April 13th, 2009, 7:28 am, edited 1 time in total.
He's named Cool Kid and they named me the agent who feared them most...: Shuichi Akai !
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Re: Puzzle: Married?
Good Idea! I'll change the name of the topic title accordingly.akai-kun wrote: Next quiz!
I think we could make a game like in other threads/forums that the one who anwered the question at first can start a new quiz, how about that idea? (But it should be with maths...)
Last edited by ayw on April 13th, 2009, 7:35 am, edited 1 time in total.
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Re: Mathematical Thinking I, II, .... (previously Puzzle: Ma
Okay here is my answer...
Now... another maths puzzle....
John is celebrating his 36th birthday. One of the guests asks him how old his brother Joe is.
John answers: I am now double as old, as Joe was, when I was as old, as Joe is now.
How old is Joe? (assuming that John's statement is correct of course)
Spoiler:
John is celebrating his 36th birthday. One of the guests asks him how old his brother Joe is.
John answers: I am now double as old, as Joe was, when I was as old, as Joe is now.
How old is Joe? (assuming that John's statement is correct of course)
"It is one of those instances where the reasoner can produce an effect which seems remarkable to his neighbor, because the latter has missed the one little point which is the basis of the deduction."
Sherlock Holmes
Sherlock Holmes
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Re: Mathematical Thinking I, II, .... (previously Puzzle: Married?)
Spoiler:

Suppose we are given an ordinary chessboard (8x8) and 32 dominoes (2x1).
Obviously, the dominoes can be arranged on the board to cover it completey.
Now, two opposite corner squares are removed. Determine whether or not 31
dominoes can be arranged on the reduced board to cover it exactly.
enjoy~
Last edited by kat1214young on April 13th, 2009, 10:22 am, edited 1 time in total.
thanks DCTP!!! ♥♥♥


thanks very much ShinRan36!!!! ♥♥♥ *mwah*




thanks very much ShinRan36!!!! ♥♥♥ *mwah*
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Re: Puzzle: Married?
ayw wrote: @akai-kun, Ah, then you were correct!Sorry about that. Well done!!
@cancerkani, Thats right, althoughWell done!!Spoiler:
Spoiler: