It gives some exam for police stations, the candidates were in a room, comes a fat guy, the first candidate stops and asks him: 
- Hey, how do 2 +2? 
- 10, sir! 
- Wrong, you fail! 
Reach the second: 
- How do 10-4? 
- 18! 
- No, you fail! 
Bla ... Bla ... reach the last (a 'little rascal ..): 
- Hey, how are June 6? 
- 12! 
- Bravo, boys, how did you figure that? 
- I fell 4 of 100.