The answer to the riddle “you enter a bedroom. there are 34 people. you kill 30. how many are in the bedroom” is four. This is because the 34 people in the bedroom include yourself, and when you kill 30, there are only four people left: yourself, the person you are speaking to, and two other people.
This riddle is a play on words, and the answer is not meant to be taken literally. It is a reminder that we should always be careful about how we use language, and that our words can have unintended consequences.
