Here goes one but capensis, pet or anyone who knows it because I already told them please don't say anything.
A Detective is investigating a club in which they suspect illegal drugs are being sold. He observes the entrances, and through his sound amplifier he hears the code to enter. The Guard says 6, and two men say 3, and they are allowed to enter. Later, Another group of men come up to the door, the guard says twelve, the men say 6. They are let in. The detective believes he knows the code and goes under cover. The Guard says 4, the detective says 2, he is immediatley shot and killed. What is the code?