What is so fragile that saying its name breaks it?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

A father's child, a mother's child, yet no one's son.

Who am I?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

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

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?