A farmer had seventeen sheep, all but nine died, how many did he have left?

• 9

You heard me before, yet you hear me again. Then I die, 'til you call me again. What am I?

• An echo

What goes up and never comes down?

• Your age

Big as a biscuit, deep as a cup, even a river can't fill it up. What is it?

• A kitchen strainer

What is everything to someone, and nothing to everyone else?

• Your mind

How many bricks does it take to complete a building made of brick?

• Only one, the last one.

What does no man want, yet no man wants to lose?

• Work - Employment

What has to be broken before it can be used?

• An egg

What gets whiter the dirtier that it gets?

• A chalkboard

What book was once owned by only the wealthy, but now everyone can have it?

• A telephone book.

The more you have of it, the less you see. What is it?

• Darkness

If you have it, you want to share it. If you share it, you don't have it. What is it?

• A secret.