Riddles

[Burdock]

I don't know how famous this is. I heard it at Uni in the days before t'Net, and it took me a couple of weeks (not continuous!) scouring the A-Z...

What is the only London underground station that does not contain any of the letters from the word 'mackerel' in its name?!

If this is solved within 2 weeks I assume someone has cheated!!

[Kyajae]

St John's Wood?

[TheFaQQer]

St John's Wood?

Yep.

Also, it is the only station with no letters from the word "blackberry" or "paperclip" or "algebra".

Oxford Circus is the only station with no letters from the word "wavelength".

Russel Square is the only station with no letters from the word "photocopying".

etc.

[Burdock]

St John's Wood?

you cheating hound!!!

[MrRobin]

Here's a good brainteaser

You're standing in a small boat on a small pond and also in the boat is a large heavy rock. You pick the rock up and chuck it in the water and it quickly sinks to the bottom.

Does the water level on the pond rise, fall or stay the same?

[Burdock]

Here's a good brainteaser

You're standing in a small boat on a small pond and also in the boat is a large heavy rock. You pick the rock up and chuck it in the water and it quickly sinks to the bottom.

Does the water level on the pond rise, fall or stay the same?

I was asked this at a job interview!!! I stammered and stuttered for 10 mins...and got it wrong...only just tho

[Diver]

Here's a good brainteaser

You're standing in a small boat on a small pond and also in the boat is a large heavy rock. You pick the rock up and chuck it in the water and it quickly sinks to the bottom.

Does the water level on the pond rise, fall or stay the same?

Water level would remain the same, the displacement created by the hull of the boat would decrease to the same volume as the diplacement created by volume of the rock.
in a perfect world that is

[MrRobin]

Water level would remain the same, the displacement created by the hull of the boat would decrease to the same volume as the diplacement created by volume of the rock.

<Roy Walker>It's good but it's not right</Roy Walker>

[Kyajae]

<Roy Walker>It's good but it's not right</Roy Walker>

The displacement of the water by the hull of the boat will depend on a) your weight and b) the weight of the rock.

The moment the rock leaves the boat but immediately before it hits the water and sinks to the bottom, the water level would go down since the boat is displacing less water (i.e. less weight).

When the rock hits the water and sinks, the water level in the pond will rise, but without knowing more about the rock, it's impossible to say if the water level will rise to below, the same or higher than the level it was at at the very start.

Or am I making this too complicated?

[MrRobin]

You're almost there Kyajae but you don't need any more info about the rock.

Hint:

it quickly sinks to the bottom