I came upon this link from the BBC-Magazine website, where online tests are to be found on the matter of Racism in all social spheres of human activity. The Harvard.edu funded project states to be resulting in a great deal of correctness about your real racit thoughts deep inside your mind 
I tried the one for Young to Old, and at the end I was given a moderately low score for being prejudiced toward the Older ones… I’ll try to work harder on that one, as time goes by and I get deeper and deeper into the older-category fellows 