## Welcome to BrainDen.com - Brain Teasers Forum

 Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account. As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends. Of course, you can also enjoy our collection of amazing optical illusions and cool math games. If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top. If you have a website, we would appreciate a little link to BrainDen. Thanks and enjoy the Den :-)
Guest Message by DevFuse

28 replies to this topic

### #11 bonanova

bonanova

bonanova

• Moderator
• 6148 posts
• Gender:Male
• Location:New York

Posted 03 April 2008 - 10:20 PM

On the right track ... but from the OP you should be able to conclude
that you start the interval from a moment of a single chime. When
does the interval end, that will make the longest time you'd have to
wait until you're sure what time it is? Think about the time the interval
starts and how long you might wait until you're sure what time it is.

That's just a restatement of the OP, but it should show that some
guesses are going to be wrong, so I hope that's a help.
• 0

Vidi vici veni.

### #12 largeneal

largeneal

• Members
• 357 posts

Posted 03 April 2008 - 10:41 PM

Ok, I'm going to be stubborn and remain confident of my answer UNLESS some other time exists that applies to this one (but I have 99% ruled that out). I don't see how it can be anything LESS than my original answer, because if it were, then that force a possibly incorrect assumption on the starting time. Maximum consecutive single chimes is 7. I don't know how it could be any LONGER than my original answer unless you're pulling some daylight savings trick here
• 0

### #13 EventHorizon

EventHorizon

Senior Member

• VIP
• 512 posts
• Gender:Male

Posted 03 April 2008 - 10:44 PM

A clock chimes the hour, every hour on the hour, and once each quarter hour in between.
If you hear it chime once, what is the longest you may have to wait to be sure what time it is?

Spoiler for my guess

Way off? Or did I get it?
• 0

### #14 Lost in space

Lost in space

Senior Member

• Members
• 4009 posts

Posted 03 April 2008 - 10:57 PM

On the right track ... but from the OP you should be able to conclude
that you start the interval from a moment of a single chime. When
does the interval end, that will make the longest time you'd have to
wait until you're sure what time it is? Think about the time the interval
starts and how long you might wait until you're sure what time it is.

That's just a restatement of the OP, but it should show that some
guesses are going to be wrong, so I hope that's a help.

single chime is 12:15 - 12:30 is the interval so thats 15mins, unless it's 00:15 then I might drop off and not be certain unless i hear the second chime of 2am, but if the wife is down stairs changing the DST at the first chime (bless her) then it could be one more hour, Da6m it's 23:5 here. Hope I do not listen to the bells Esmerelda (that name rings a bell)
• 0

### #15 EventHorizon

EventHorizon

Senior Member

• VIP
• 512 posts
• Gender:Male

Posted 03 April 2008 - 10:58 PM

...I don't know how it could be any LONGER than my original answer unless you're pulling some daylight savings trick here

• 0

### #16 bonanova

bonanova

bonanova

• Moderator
• 6148 posts
• Gender:Male
• Location:New York

Posted 04 April 2008 - 04:48 AM

Wow. It's not that hard. Really.

OK let's get the clutter out of the way.
[1] forget DST - say it's the middle of June.
[2] If you hear, say, the last chime of 12:00, you heard all 12 chimes.
Hmmm... I guess that's it.

Here's a hint.
One of EventHorizon's time intervals is correct, but the reason given
[start and end points] is not.

OK so now the answer should include the interval and the end points.

Final hint. No seconds are involved.
For the purpose of calculating intervals, you may assume every chime [however many
individual sounds it has] happens instantaneously on precisely :00, :15, :30, or :45.

There it is, on a platter.
Take it.
• 0

Vidi vici veni.

### #17 Nikyma

Nikyma

Senior Member

• Members
• 1354 posts
• Gender:Female
• Location:Minneapolis, MN

Posted 04 April 2008 - 05:08 AM

Spoiler for Where's my fork?

• 0

### #18 Duh Puck

Duh Puck

• Members
• 445 posts

Posted 04 April 2008 - 05:08 AM

Spoiler for NON-solution

*Edit: Oops. My bad. I somehow left 1:45 out as a possibility at 1:15, which means 1:30 could be 1:30 or 1:45, and you'd have to wait the full 90 minutes, as largeneal said. Ok, now I'm perplexed.

Edited by Duh Puck, 04 April 2008 - 05:13 AM.

• 0

### #19 largeneal

largeneal

• Members
• 357 posts

Posted 04 April 2008 - 05:18 AM

where is 1:45, though?
• 0

### #20 giterdone

giterdone

Senior Member

• Members
• 551 posts

Posted 04 April 2008 - 05:28 AM

Spoiler for a better guess

Spoiler for check and mate

• 0

#### 0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users