The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What is the riddle which can be asked all day with a different correct answer each time.

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Do You See It?

What you cannot hold but it is yours?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?