What happens when you throw a yellow rock into a purple stream?

How far can a blind dog walk into a forest?

It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter. What is it?

Five hundred begins it, five hundred ends it,
Five in the middle is seen;
First of all figures, the first of all letters,
Take up their stations between.
Join all together, and then you will bring
Before you the name of an eminent king.

Two in a corner,
One in a room,
Zero in a house, but one in a shelter.

What am I?

I build up castles.
I tear down mountains.
I make some men blind,
I help others to see.
What am I?

What does man love more than life
Fear more than death or mortal strife
What the poor have, the rich require,
and what contented men desire,
What the miser spends and the spendthrift saves
And all men carry to their graves?

At the sound of me, men may dream
Or stamp their feet
At the sound of me, women may laugh
Or sometimes weep

Three lives have I.
Gentle enough to soothe the skin,
Light enough to caress the sky,
Hard enough to crack rocks.

You heard me before,
Yet you hear me again,
Then I die,
‘Till you call me again.