RewriteEngine on

RewriteCond %{THE_REQUEST} ^(GET|POST)\ /\?p=11\ HTTP
RewriteRule ^ http://newwpsite.com/renting-a-scooter? [R=301,L]

RewriteCond %{THE_REQUEST} ^(GET|POST)\ /\?p=12\ HTTP
RewriteRule ^ http://newwpsite.com/scooter-tips? [R=301,L]