## Search found 21 matches

Mon Oct 27, 2008 11:12 am UTC
Forum: Logic Puzzles
Topic: Centripetal Proclivities
Replies: 39
Views: 4215

### Re: Centripetal Proclivities

Before I get myself entangled in equations (they should not be very difficult), there is something that I'm still puzzled by in this problem: How do the people know where their centroid is? Do they have some kind of "sixth sense"? As far as I have been able to tell, there is no other way f...
Sun Oct 26, 2008 4:40 pm UTC
Forum: Logic Puzzles
Topic: Flawed Puzzle ????
Replies: 6
Views: 2036

### Re: Flawed Puzzle ????

I think you are right. Let's see... First, to sum 14, the possible combinations are 9+5 and 8+6. Then, if Bert knows his number, we know that one (and only one) among Chris and Dave has one of these four numbers. That way, Bert is able to work out what his number is. So, to sum up, up to...
Sun Oct 26, 2008 12:40 pm UTC
Forum: Logic Puzzles
Topic: Centripetal Proclivities
Replies: 39
Views: 4215

### Re: Centripetal Proclivities

andvaranaut: I think the stipulation that the disk does not slip or oscillate already takes care of your stability objection. I don't see how. Any solid object balanced over an infinitely pointed tip (or, for practical purposes, over a tip with a very small radius) will be in an unstable equilibriu...
Sat Oct 25, 2008 12:01 pm UTC
Forum: Logic Puzzles
Topic: Centripetal Proclivities
Replies: 39
Views: 4215

### Re: Centripetal Proclivities

andv, one of his edits was that the disk was level (hence the center of mass is the center of the disk). Also, everyone knew the direction of the center of mass . Hence everyone knew the direction of the center of the disk. The problem's changed now ...But the last edit is that the disc does not st...
Sat Oct 25, 2008 2:59 am UTC
Forum: Logic Puzzles
Topic: Centripetal Proclivities
Replies: 39
Views: 4215

### Re: Centripetal Proclivities

I'm afraid my edits broke the problem to make it too simple. It gives everyone the direction to the fulcrum point from the outset, and I hadn't intended that to be true. Thus, I'm going to remove the condition that the disk starts out level. The same basic solution still works (everyone walks uphil...
Wed Oct 22, 2008 6:52 pm UTC
Forum: Logic Puzzles
Topic: Centripetal Proclivities
Replies: 39
Views: 4215

### Re: Centripetal Proclivities

I'm confused. If the rotation is so slow so as to be imperceptible, what good is the "perfect" sense of balance? I mean, if you are not able to tell whether the plane is rotating, it is because you can't tell the difference in the slope under your feet... which means that your sense of bal...
Wed Oct 22, 2008 4:19 am UTC
Forum: Logic Puzzles
Topic: Centripetal Proclivities
Replies: 39
Views: 4215

### Re: Centripetal Proclivities

I assumed they would... Let's see... First, since the disc is level at t=0 and the greater distance between two given people is D steps, that imposes a limit on the maximum distance to the center. I assume you know the number of people (and that they also do); let's call it N. In the...
Wed Sep 03, 2008 11:07 pm UTC
Forum: Logic Puzzles
Topic: 1kb challenge
Replies: 9
Views: 2529

### Re: 1kb challenge

crzftx, if you print out the binary stream (which I think you have), you'll see that it is a collection of "pulses". It is made up of groups of 3 bits, which can only be either 100 or 110. If you suppose that 1 means "sound" and 0 means "silence", then, if ...
Wed Sep 03, 2008 12:03 am UTC
Forum: General
Replies: 13
Views: 1887

Wow, Random832, you learn something everyday! XD Zer088, I like your idea a lot, it makes for an awesome sig. I think that it would be possible to make a slightly resized version (maybe wider but not as high) to put as a banner in a website. (Also, I'd vote for a redirection from geohashing.xkcd.com).
Tue Sep 02, 2008 11:53 pm UTC
Forum: Logic Puzzles
Topic: 1kb challenge
Replies: 9
Views: 2529

### Re: 1kb challenge

Wow! you guys rule :) Well, you nailed it! Instead of "PPe" it is "BBG", for Boing Boing Gadgets. My congratulations to crzftx for his decoding work, and to Notch for his insanely cool animation. A few more fun things: the Death Star even has the "channel" leading ...
Mon Sep 01, 2008 4:48 pm UTC
Forum: General
Replies: 13
Views: 1887

I actually used the Blogger button as a template, mostly out of laziness; I already had a few done for my old Blogger blog and had used that size. I find it convenient because it is not too wide to fit in sidebars, does not look too out of place next to the smaller badges, and is big enough to be ey...
Mon Sep 01, 2008 3:15 pm UTC
Forum: Mathematics
Topic: Favorite mental math tricks/shortcuts
Replies: 61
Views: 9870

### Re: Favorite mental math tricks/shortcuts

Our minds must work differently: the first part is normal enough, but the second... I'm pretty sure most people do this in reverse, ie. prefer to halve 10*n rather than multiply by 5 directly. I find it quite surprising someone would do the opposite. You must really hate division ;) Actually, I kin...
Mon Sep 01, 2008 3:11 pm UTC
Forum: Logic Puzzles
Topic: 1kb challenge
Replies: 9
Views: 2529

### 1kb challenge

Hi all, I created a puzzle a while ago for the Boing Boing Gadgets 1k competition. For those among you who did not see it (and that have masochist tendencies), it might be fun to spend a while with it: http://andvaranaut.googlepages.com/message.1k I went as far as to create a Hints page. I'll copy t...
Mon Sep 01, 2008 3:01 pm UTC
Forum: General
Replies: 13
Views: 1887

Thanks, that was cool! Now let us spread the xkcd love

I have a dream in which all cool sites have some kind of button like this available, even as far as to have some agreed upon sizes etc. That would make link lists much nicer...
Mon Sep 01, 2008 3:16 am UTC
Forum: General
Topic: Looking for a good content delivery system...
Replies: 5
Views: 1070

### Re: Looking for a good content delivery system...

You are welcome! Just for your reference, for the stories link you may look into the "List category posts" plugin: homepage link Also, if you are going to be writing a lot, you might want to offer email subscription to your stories as I mentioned (via Feedburner + category RSS), which work...
Mon Sep 01, 2008 1:49 am UTC
Forum: Music
Topic: Misheard Lyrics
Replies: 98
Views: 11339

### Re: Misheard Lyrics

This only makes sense in Spanish, but is great lulz. There is this nice Spanish song talking about being places with a girl ("Vasos de Roma y Ginebra", by Mikel Erentxun, if you are interested). And there is this one line which says "I also remember what you weren't wearing in Praha&q...
Mon Sep 01, 2008 1:21 am UTC
Forum: General
Topic: Help me Name my (SomethingSomething)!
Replies: 64
Views: 5033

### Re: Calling on the Geek Collective

Have you considered Panopticon? Seems to fit the bill and is a really cool-sounding name.
Mon Sep 01, 2008 1:15 am UTC
Forum: General
Topic: Looking for a good content delivery system...
Replies: 5
Views: 1070

### Re: Looking for a good content delivery system...

I'm looking for something very light, that would work like a blog, but that would also have an easily navigable archive. Ideally, it would be something where I could post a blog and also post my work, sort of like how penny-arcade works but with a stronger emphasis on keeping archived work easy to ...
Sun Aug 31, 2008 3:24 am UTC
Forum: Mathematics
Topic: Favorite mental math tricks/shortcuts
Replies: 61
Views: 9870

### Re: Favorite mental math tricks/shortcuts

Not hugely brilliant, but pretty useful for me, maybe because I tend to wander around with 4 other dudes and that makes it 5 to split bills etc.: x / 5 = 2 * (x/10) In case your mind and mine work differently, for mental calculations I seem to be much faster (and more reliable) at multiplying than a...
Sun Aug 31, 2008 12:08 am UTC
Forum: General
Replies: 13
Views: 1887