Hard Riddles and Answers

Question: There are 4 light bulbs in a room and 4 switches corresponding to these four light bulbs (in a random order). You cannot see the light bulbs from where the switches are.

If you can only visit the room with the light bulbs once, how can you figure out which switch belongs to which light bulb?

Question: Does an ounce of gold or an ounce of feathers weight more?

Question: I am a big threat to humanity,
but you wouldn't get rid of me even if you could.

What am I?

Question: At the end of a long dark cave there is a monster made of lead. Be careful. One twitch of the finger and you will release it.

What is it?

Question: How high would you have to count before you use the letter 'A' in the spelling of a number?

Question: You are running in a 400 meter race and you overtake the last person, what place are you now in?

Question: A pet shop owner had a parrot with a sign on its cage that said "Parrot repeats everything it hears." A young man bought the parrot and for two weeks he spoke to it but it didn't say a word. He tried to return the parrot but the shopkeeper said he never lied.

How can this be?

Question: I can be half without getting thinner.
I can shine with no fire.
I can be hidden but never taken.
I can stay dry while moving the ocean.

What am I?

Question: What English word is as long as it is valued?

Question: I can be dropped from the tallest of buildings and survive,but drop me from the smallest ship and I won't.What am I?