Checking PageRank of inner pages can be very tiring, time consuming and sometimes not feasible. I came across this site on internet, Google Pagerank inspector,

Just Type in your Home Page URL, and it will automatically parse through all your pages and display PR of each page

Some helpful Google tips and tricks. This sheet contains how to use

1. Operators like OR,define,* to improve your search result
   
2. Calculator Operators to perform calculations.
3. Advanced operator like "site:","date:" etc
4. URL for various Google service.
   

Click to enlarge the image.