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05-26-2005
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#11 (permalink)
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¿42?
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Re: Math riddles
How much dirt is in a hole 6 and a half feet wide, 8 feet deep, and 5 feet long?
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05-27-2005
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#12 (permalink)
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Exhausted Gondolier
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Re: Math riddles
If it's a hole, I guess there ain't much dirt in it...
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05-27-2005
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#13 (permalink)
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Understanding
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Re: Math riddles
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Originally Posted by Qfwfq
If it's a hole, I guess there ain't much dirt in it...
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...is the right answer! (and if you highlight it, you will see some text, too!)
If Viv is 11, why is Dave 505? |
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05-27-2005
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#14 (permalink)
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Visions of grandeur
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Re: Math riddles
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Originally Posted by C1ay
How much dirt is in a hole 6 and a half feet wide, 8 feet deep, and 5 feet long?
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Absolutely NO DIRT , but it would however contain, 260 cubic feet of air.
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Tolstoy wrote; "men only learn when they're suffering". The question is; how much do you want to learn?
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05-27-2005
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#15 (permalink)
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Exhausted Gondolier
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Re: Math riddles
I can understand Dave being 505, although normally Dv would be, but I fail to understand Viv being 11. Viv could be 9, although normally Ix would be, or perhaps Viv could be 515, although normally Dxv would be....
Last edited by Qfwfq; 05-30-2005 at 12:51 AM..
Reason: errata corrige
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05-27-2005
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#16 (permalink)
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Exhausted Gondolier
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Re: Math riddles
Ah, yes, of course, Viv could even be 11, even though normally Xi would be.
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05-27-2005
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#17 (permalink)
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Understanding
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Re: Math riddles
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Originally Posted by Qfwfq
Ah, yes, of course, Viv could even be 11, even though normally Xi would be.
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Yes, VIV is 11, because you are simply adding the roman numerals. I didn't want to get too obscure! I don't know anyone called Xi, either. Actually, it *is* a Chinese name... but it wouldn't work so well for the slight misdirection... |
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02-22-2006
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#18 (permalink)
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Curious
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Re: Math riddles
I have one...I don't know the answer so that's why I'm here. It's for my son's extra credit. We can't figure it out. Help?!? I typed it exactly as it is on his paper.
here goes...The knight needs to cross the moat which is 10 yards wide without getting eaten by the alligators. He looked around and found only 2 planks that were each 9 yards long. The knight has no way to fasten them together. How can the knight cross the moat and get to his princess?
It appears to me that the castle is in the center of the moat and it is 10 yards wide on all sides. My son also said the water is too deep to use them as stilts. The knight has no tools or anything like that.We thought we could overlap them but the boards will fall apart in the middle. Anyone have any suggestings??
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02-22-2006
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#19 (permalink)
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Percipient
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Re: Math riddles
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Originally Posted by mheavner
I have one...I don't know the answer so that's why I'm here. It's for my son's extra credit. We can't figure it out. Help?!? I typed it exactly as it is on his paper.
here goes...The knight needs to cross the moat which is 10 yards wide without getting eaten by the alligators. He looked around and found only 2 planks that were each 9 yards long. The knight has no way to fasten them together. How can the knight cross the moat and get to his princess?
It appears to me that the castle is in the center of the moat and it is 10 yards wide on all sides. My son also said the water is too deep to use them as stilts. The knight has no tools or anything like that.We thought we could overlap them but the boards will fall apart in the middle. Anyone have any suggestings??
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Maybe prop them with each other in a 'tepee' fashion, like an A frame? One leg end on each side of the moat.
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 semantics is not always just pedantic quibbling. ~ douglas r. hofstadter |
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02-22-2006
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#20 (permalink)
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Creating
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Silver Spring, MD, USA
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Re moat and plank puzzle
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Originally Posted by mheavner
The knight needs to cross the moat which is 10 yards wide without getting eaten by the alligators. He looked around and found only 2 planks that were each 9 yards long. The knight has no way to fasten them together. How can the knight cross the moat and get to his princess?
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If one of the planks is massive enough, the knight can lay it so that it extends slightly more than 1 yard across the moat, then lay the other one so that it just bridges the remaining slightly less than 9 yard gap.
For this scheme to work, the knight must mass less than 4 times the plank. If both planks have the same mass, the knight must mass less than 7 times their total mass. |
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