Hard clean riddles for kids

I know a number which when multiplied by multiple of 9 i.e 9 18 27 36 45 ... The output consist of number containing only one digit. Can you identify the number?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

A beggar's brother died, but the man who died had not brother. How could this be?

What has two hands and face but no arms and legs?

Why is a river rich?

A mirror for the famous, but informative to all. I'll show you the world, but it may be a bit small. What am I?

I am a five letter word and very strong. I become single when you remove two letters from me. What Am I?

What goes up but never comes down?

You are in a cabin and it is pitch black. You have one match on you. Which do you light first, the newspaper, the lamp, the candle, or the fire?

I am a 5 letter word. Take away the first letter and I am a country's name. Take away the first two letters and I become the opposite of the 5 letter word. Who am I?