Fun Riddles

Question: I'm written with two letters, said with one and seen with two.What am I?

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?

Question: Why can't the Tyrannosaurus rex clap?

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: 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?