Anyone got any good PUZZLES?

[Simster]

I've got one. I won't post the answer here because it would be nice to get a set of CHALLENGING puzzles together.

You have a a set of scales and 12 marbles. You know that one of the marbles is a different weight to the other eleven, but you don't know whether it's lighter or heavier.

How do you find the odd marble, with only THREE weighings?

Anyone got any others?

Perhaps we could do a "Puzzle Answers" thread if the need arises.

 

[Mendoza]

I'll start with an easy one


A man threw a ball out of his window, it came back through and he caught it.
The ball didnt touch anything from the moment it left his hand, until he caught it again - how come?

 

[Titanic]

oops... sorry

 

[Moshe Gariani]

I'll start with an easy one


A man threw a ball out of his window, it came back through and he caught it.
The ball didnt touch anything from the moment it left his hand, until he caught it again - how come?

was it one of those very lightweight plastic balls and a strong gust of wind blew it back in...?

 

[Buttinhams]

I'll start with an easy one


A man threw a ball out of his window, it came back through and he caught it.
The ball didnt touch anything from the moment it left his hand, until he caught it again - how come?

It was on a piece of elastic?


A bus driver goes the wrong way down a one-way street. An on-duty traffic policeman sees him and smiles but does nothing. Why?

 

[BensGrandad]

Puzzle why has Wilkins given Loft another contract?

 

[Mendoza]

It was on a piece of elastic?

was it one of those very lightweight plastic balls and a strong gust of wind blew it back in...?

Nope and Nope

 

[haardman]

The window was in his roof (i.e. the ball went straight up & down)

 

[Nibble]

I'll start with an easy one


A man threw a ball out of his window, it came back through and he caught it.
The ball didnt touch anything from the moment it left his hand, until he caught it again - how come?

Was the window a skylight in his roof?

 

[Mendoza]

The window was in his roof (i.e. the ball went straight up & down)

Was the window a skylight in his roof?

a sky light indeed was the answer

 

[Nibble]

A lady gives birth to two daughters on the same day of the same year but they are not twins, how can this be?

 

[readingstockport]

It was on a piece of elastic?


A bus driver goes the wrong way down a one-way street. An on-duty traffic policeman sees him and smiles but does nothing. Why?

The bus driver was walking. Obvious. Not sure why the gimp copper smiled at him though.

 

[Gazwag]

A lady gives birth to two daughters on the same day of the same year but they are not twins, how can this be?

She gave birth to one on a Monday in January and the second on a Monday in November

 

[Nibble]

She gave birth to one on a Monday in January and the second on a Monday in November

Fraid not, both born on the same day, same month, same year.

 

[Titanic]

I'm confused now... are we meant to be posting answers here or not?

 

[Titanic]

and are they scales which tell you the weight of things or balances that compare the weight on either side?

 

[Alex Alex Dawson oo! oo!]

A lady gives birth to two daughters on the same day of the same year but they are not twins, how can this be?

She gave birth to another as well so they're triplets, not twins.

 

[Titanic]

and are the marbles numbered? and if not, can I mark them?

 

[Gully]

A man walks into an l-shaped room in complete darkness, by the door there is a switch with three buttons on it, each one operates a light around the corner from where he stands. He needs to know which light is operated by which switch, unfortunately he cannot see them from where he is stood by the door, as they are around the corner. He may operate the light switches and then go to look at the lights, once he has gone round the corner he may not return, how does he decide which switch operates which light.

 

[Gazwag]

A man walks into an l-shaped room in complete darkness, by the door there is a switch with three buttons on it, each one operates a light around the corner from where he stands. He needs to know which light is operated by which switch, unfortunately he cannot see them from where he is stood by the door, as they are around the corner. He may operate the light switches and then go to look at the lights, once he has gone round the corner he may not return, how does he decide which switch operates which light.

If it's an L shaped room he doesn't need to go around the corner to look at the lights