is it possible to place ads code for all 3 questions inst…

Hi Mario,
this is not possible. It is limited to only 5 in order to protect you. Most ad services such as AdWords have a limit on how frequently you can display an ad based on the amount of content. If I reduced the limit to 3, there would be a high chance that it would violate the ad networks terms of services and you could have your entire account suspended!