Short Riddles and Answers

Question: I have all of your knowledge but could fit in your hands.

What am I?

Question: Change a long pause into a short one by doubling a letter.What are the words?

Question: What sport starts with a T, has four letters, and is played around the world?

Question: I'm small but big, i hide behind you but come out when you fall... What am I?

Question: 4 people walk onto a bus, there are only babies on the bus what is on the bus