Yes, these features are really needed It's hard sometimes to make suitable number of questions so selecting no of questions would be great.

Ok, thanks for reply.

I certainly don't have a problem if this doesn't show in the statistics.

Do you mean that author of the quiz isn't included in statistics of his quiz and don't get money in Cash mod?that would be great.

Is it possible to disallow quiz author to take part in the quiz... he/she creates the quiz, so he/she knows all answers, it's not fair...

Is it possible to allow users to play only once each quizz?