86de5828_User_Tips__SERP_URL_Parameters__Description
[URL Parameter] num [Format Example] http://google.com/search?q=cheese&num=100 [Description] 
Set the number of results per page to display in the SERPs. It is SO much faster to switch to 100 results per page by adding &num=100 to the end of the Google URL rather than going into the Search Settings screen.
Google Power User Tips: SERP URL Parameters
Description