poora pagal

aik headmaster ne aik ladke se poochha keh aik train multan se karachi 6 gantoon(hours) mian jati hai ab batao mery ummar kitny hai? student soch ker 50 saal. Headmaster bahut khoosh hoaa aur os ko inaam bhi diya aur kaha tum ko kaise pata chala? Ladke ne kaha Sir!mere uncle muj se aise sawal kerte hain hain to main un ko aadha pagal kehta hoon aur un ki ummar 25 saal hai aur aap ne to un se bhi ulta sawal kiya hai to main ne andaza lagaya keh aap ki ummar yaqeenan 50 baras ki ho gi.......ha ha