I would not be at all offended if someone else were to post a new one. (Actually, Mick got the correct answer... so he's equally on the hook.)
I will put something up eventually though, if nobody has thought of any other good ones by then.
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I would not be at all offended if someone else were to post a new one. (Actually, Mick got the correct answer... so he's equally on the hook.)
I will put something up eventually though, if nobody has thought of any other good ones by then.
How about if Mark leaves Heathrow at 06.00 oclock and lands in New York at 08.00. How long is he in the air?
It depends how many people under five you're travelling with. A few years back, when Nell and Grace were four and two respectively, I seem to remember being on a flight for several days.Quote:
Originally Posted by prendrelemick
Also taken from the Net, and a variation on the previous one...
Three women - one of whom we'll call Intelligentsia, because she has a talent for logic problems, and is therefore an absolute blast at extended wine-bar lunches - are sitting in a circle. They are blindfolded and told that a spot of either red or white will be put on each of their foreheads.
A red spot is then put on each of their foreheads.
The blindfolds are removed and they are told to raise their hand if they can see any red spots. All three raise their hands.
They are told to lower their hands if they know what colour spot they have on their own forehead.
Intelligentsia ponders for a moment, and then lowers her hand.
What has she figured out that the other two haven't?
uh, uh..
All those wine bar lunches paid off, she can smell the Pinot Noir on her forehead.
Because precision of language is so important in these things, I've edited the problem slightly.
...just as a clue - the other two women are pretty bright too. But not as bright as Intelligentsia.
Oh, one of the others has a white spot on their head. So the OTHER (3rd) woman must've seen a red spot on Intelligentsia's head.
No, they all have red spots.Quote:
Originally Posted by billl
It has something to do with the plural "spots"?
Seven hours?Quote:
Originally Posted by prendrelemick
Nope - there's nothing tricksy about it. The problem is just as it appears.Quote:
Originally Posted by billl
But if Intelligentsia can see a red spot on each of the other women's heads, then it doesn't matter if she has a red or white spot--the other women would each see (at least the one) red dot. How could she be sure she didn't have a white dot?
Is it because the others would've known that THEY would both have a red dot if she had a white dot and didn't announce that she was sure that she had a red dot? And so the pause means no one can be sure, which means: three red dots...?
I see, then! So all three are smart enough to figure it out, if the given the visible dots are sufficient--but she is the first to figure out that she can, on account of their uncertainty, figure it out even when the visible dots had left some ambiguity...
If the others are logical, Intelligentsia can be completely certain she has a red spot - unambiguously.
But you're damn close (in fact, you might be right, but I'm not certain about the phrasing).
Quote:
Originally Posted by billl
Quote:
Originally Posted by billl
Is it? Crikey!
OK, this is work in progress
If Intelligensia had a white dot, then the other two would know they had red dots, because all three had seen a red dot. (so at least two dots had to be red) As they didn't know, Intellegensia's had to be red.
Does that make sense?
Actually, I just re-read what I wrote late last night, and it is really, really a mess. In particular, Intelligentsia's hypothetical behavior in the middle portion makes no sense. And near the end, where I say "ambiguous", I was just trying to convey the "As they didn't know" phrase that Mick uses in his solution.
Can we go back to sheep and farmers? At least I got that one.
I still think my answer in post 728 has something to it: Intelligentsia would have raised her hand (immediately) if she had seen that the other women had one white and one red dot between them. Since the woman with a red dot had acknowledged seeing red, that would mean that Intelligentsia would have to have a red dot as well.
The thing that threw me off was my misreading of the problem. It specifically states that all three have red dots. (I'm wondering if there might be a series of "Dotted Head" puzzles, with slight variations like this...)
I think we are all free to come up with one now, but I might take a day or two, unless I luckily stumble upon one quickly. I will keep your preference in mind, though.Quote:
Originally Posted by jajdude
Quote:
Originally Posted by billl
But then they would all know what dot they had - I think.
Good point (I love this kind of puzzle). Still, Intelligentsia would get the win (first lowered hand?) because of her noted mental superiority.Quote:
Originally Posted by prendrelemick
(I think the one woman with a white dot wouldn't know *at first*, but the other red dot woman would know, same as Intelligentsia. Of course, after judging both of the red dot women's reactions, I guess the white-dotted woman could deduce her own white dot, much the same as Intelligentsia deduces her red dot in the original puzzle based on the reaction of the others... That's the interesting twist with some of these angles--it depends on judging the reactions of the others).
Ok, time for a quickie.
I remember an interview given by Muhammud Ali before the "Rumble in the Jungle" fight. He said something along the lines of :- "Why I'm so fast, when I turn out the light by the bedroom door, I can be across the room and into bed before it goes dark." Typical Ali boastfull humour I thought. But then I realized he could actually do it.
How.
Luminous wallpaper.
Or, with a big fight scheduled for the following day, he gets a really early night.
Yes, one of those answers is right.:smilewinkgrin:
For jajdude...
http://homepages.paradise.net.nz/wmg/Sheep.html
baad jokeQuote:
Originally Posted by prendrelemick
12-26-21-15 29-18-25-26-15 15-26-14-19-17-25-26 16-19-36-23-13-14 12-18-36-23-19-12 _-_-_-_-_-_?
35-14-13-21-28-22
He goes to bed before the sun goes down.Quote:
Originally Posted by prendrelemick
I thought that would take longer. Have we used that code before?Quote:
Originally Posted by prendrelemick
No, It's a beaut though.Quote:
Originally Posted by MarkBastable
Quote:
Originally Posted by Delta40
That's correct too. Have you a puzzle to post Delta? If so, please go ahead.
Yeah, I was quite pleased with it, which is why I was a bit miffed you got it so quickly.I thought maybe it was less original than I imagined.Quote:
Originally Posted by prendrelemick
How can you throw a ball as hard as you can and have it come back to you, even if it doesn't bounce off anything? There is nothing attached to it, and no one else catches or throws it back to you.
Do it in such a way that it's, practically, in orbit. So, for instance, from quite high up on Earth. Or on a small planet with enough gravitational pull to stop the ball flying off into space, but not quite enough to bring it to the ground.Quote:
Originally Posted by Delta40
Or throw it straight up, but (and this is crucial) *not* hard enough to attain orbit.
Or hurl it close enough to a small planet for a gravitational slingshot effect to bring it back.
or throw a beach all into a stiff easterly wind on Skegness Beach. ( it works I've done it too often.)
Or toss it into the water upstream as hard as you wish, while standing, immersed, in one of those amusement park flume rides.
Or in a Tom and Jerry moment, it enters a hole in a tree, dissappears for a bit, then comes out of a lower hole, (preceeded by an angry squirrel) rolls along a branch, into some roof guttering, along the roof guttering, down a down spout, across the lawn and comes to rest at your feet.
It could happen you know.
I like the one with the squirrel.