Logic Puzzle
Logic Puzzle
Can you work this out (see the photo at top of article, that's all you need) without watching the explanation video?
I failed unfortunately... Interesting though
Cheryl's Birthday: Singapore's maths puzzle baffles world - http://www.bbc.co.uk/news/world-asia-32297367" onclick="window.open(this.href);return false;
Live forever or die trying
I failed unfortunately... Interesting though
Cheryl's Birthday: Singapore's maths puzzle baffles world - http://www.bbc.co.uk/news/world-asia-32297367" onclick="window.open(this.href);return false;
Live forever or die trying
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Occams Razor
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Re: Logic Puzzle
Albert knows that Bernard knows the number. There is only one 18 and only one 19, so for Albert to be sure that Bernard doesn't know the date he must know that it isn't May 19 or June 18.
Albert doesn't know the number, but he does know the month. So the only way he can be sure that it isn't May 19 or June 18 is if he knows that it isn't May or June.
So as soon as he says he knows that Bernard doesn't know, we (and Bernard) can work out that it isn't May or June.
Bernard already knows the number. So as soon as he finds out that it's either July or August, he knows the whole date. (Albert still knows only which month.)
When Bernard says that he knows the whole date, Albert knows that it can't be the 14th - because then Bernard would still not have known whether it was July 14th or August 14th.
Albert already knows the month so knowing it can't be the 14th, he knows the whole date too.
When Albert says that he knows the whole date, that tells us that it has to be in July. Because if it were August, Albert still wouldn't know whether it was August 15 or August 16.
So now we know it's July, and we found out earlier that it couldn't be the 14th so it has to be July 16th.
Albert doesn't know the number, but he does know the month. So the only way he can be sure that it isn't May 19 or June 18 is if he knows that it isn't May or June.
So as soon as he says he knows that Bernard doesn't know, we (and Bernard) can work out that it isn't May or June.
Bernard already knows the number. So as soon as he finds out that it's either July or August, he knows the whole date. (Albert still knows only which month.)
When Bernard says that he knows the whole date, Albert knows that it can't be the 14th - because then Bernard would still not have known whether it was July 14th or August 14th.
Albert already knows the month so knowing it can't be the 14th, he knows the whole date too.
When Albert says that he knows the whole date, that tells us that it has to be in July. Because if it were August, Albert still wouldn't know whether it was August 15 or August 16.
So now we know it's July, and we found out earlier that it couldn't be the 14th so it has to be July 16th.
Re: Logic Puzzle
Typical of your ex profession to go and spoil it. ..
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Occams Razor
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Re: Logic Puzzle
Now that it's no longer my job, I'm just an enthusiastic amateur.lee wrote:Typical of your ex profession to go and spoil it. ..
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jimmytanko
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Re: Logic Puzzle
My missus is called cheryl and been with her for 4 years and still don't know her bloody birthday.
Might give bernard and albert a call nearer the time
Might give bernard and albert a call nearer the time
Re: Logic Puzzle
Greedy cow gave those 10 dates to those 2 lads hoping for 10x2=20 presents! Pffft!
Re: Logic Puzzle
jimmytanko wrote:My missus is called cheryl and been with her for 4 years and still don't know her bloody birthday.
Might give bernard and albert a call nearer the time
