Funny Riddles

Question: Little Johnny is walking home. He has $300 he has to bring home to his mom. While he is walking a man stops him and gives him a chance to double his money. The man says "I'll give you $600 if you can roll 1 die and get a 4 or above, you can roll 2 dice and get a 5 or 6 on at least one of them, or you can roll 3 dice and get a 6 on at least on die. If you don't I get your $300."

What does Johnny do to have the best chance of getting home with the money?

Question: How can "L" be greater in size than "XL"?

Question: What is the only question you can't answer yes to?

Question: When you do not know what I am, then I am something. But when you know what I am, then I am nothing. What am I?

Question: Timmy's mother has three children. The first was named April. The next was named May.

What is the final one's name?