>>That's basically right. As you said if there were only one unfaithful wife, she would be shot immediately that night.
>>
>>But after the first night no one is shot.
>>Every other man in town knows there are 2 unfaithful wives.
>>
>>But this one man, let's say the mayor knows only of one. When he sees that no one is shot. He knows there must be 2 women and because he knows only of one the other must be his wife.
>>
>>So now let's say there are 3 unfaithful wives?
>
>In Russia this is called the law of induction. I never studied math here, so I don't know, how is it called. Anyway, the same logic would apply...

So now extrapolate to the original question.
What would happen if there were 40 wives and when ( how many days )?