American And Indian Baby

An American Boy asked a friend of his indian boy
american boy:   how old are you???

Indian Boy: when i am at home i am 14years old
                   
                    when i am school i am 12years old
            
                    when i am in bus i am 10years old

                    when i am in train i am 7years old

                    when i am on facebook i am 18 year old