Placing google adds and google search on same page

Can i place google adds and search on the same page

[mani]

I have 2 questions.
1-Can someone place google adds as well as google search field on same page of web site.
2-If someone has placed more than 3 google adds on a single page,though 4rth one or 5th one will not appear,but question is will this effect someone's account at google.

[lammert]

1 - You can have a Google Adsense search box on the same page where Google Adsense ads appear.

2 - You should have a maximum of three ad blocks on your pages. More than three is against the TOS, and a reason to be banned from Adsense. Don't rely on the Google ad server to automatically filter the 4^th and 5^th ad block. If they filter the ads, they will certainly also log an entry in their huge database that this happend.

[mani]

Thanks a lot
Is CPM higher for placing 2 adds or for placing 3 adds on a single page.