First hour: lateral puzzle #2

The doorman at an exclusive club says one word to each prospective entrant. If the entrant answers correctly he is allowed to enter; otherwise, he is rejected.

A hopeful nonmember observed carefully as a member approached. The doorman said, "Twelve." The member replied, "Six." He was admitted. A second member came up. The doorman said, "Six." The member replied, "Three." He was admitted. The man now decided that this was easy and he stepped forward. The doorman said, "Ten." The man replied, "Five." The doorman angrily kicked him out. What should he have said?

CLUES:

(1) The code would work in other languages, but probably with a different combination of numbers. For example, in Italian, the doorman might say "Otto," and the member reply, "Quattro."
(2) The code was based soley on numbers.

Second hour: lateral puzzle #2

A lady knocked at the door of a tiny cottage and when an old lady opened the door she said, "Good Morning, Mrs. Turner." Neither of them had ever met, or seen or heard of the other before. How did she know the old lady's name?

CLUES:

(1) The profession of the lady knocking is important

Third hour: lateral puzzle #2

A man was born in Boston, Massachusetts. Both his parents were born in Boston, Mssachusetts. He lived all his life in Boston but he was not a United States citizen. Why?

CLUES:

(1) There was nothing strange about this man
(2) His friends and neighbors were also not United States citizens.