Short Riddles and Answers

Question: You can only keep it once you give it to somebody.

What is it?

Question: This sentence is false.

Is the preceding sentence true or false?

Question: What flies when it's born, lies when it's alive, and runs when it's dead?

Question: what are the next two letters in this sequence: A, E, F, H, I, K, L, M,

Question: 3 rich guys walk into the bar one man walks out rich how is this possible