Logic Riddles

Question: Two brothers are twins. One twin says he is older than the other. The other twin is confused and says: in order for us to be twins we have to born on the same day. How is the one twin older than the other?

Question: I have a large family. I have just as many brothers as i do sisters. Each of my sisters has only half as many sisters as brothers. How may brothers and sisters are there in my family all together

Question: While the barracuda uses opportunity and speed to prey on other large fish, it has little interest in humans. Barracuda attacks on humans are rare; but when they do, what is the reason?

Question: In 2000, a 40-year-old doctor told his son that, when he was a little boy, he decided to be a doctor after seeing on the internet a heart transplant being performed on a puppy with a defective heart so that the puppy could live a normal life. The boy then thought about being a doctor too someday so that he could help people in a similar way. What's wrong in this story?

Question: What did the banana say to the elephant?