For some easy questions, especially the ones before 10, when I spot an answer that I am 90% to be sure, can I just circle it and move on instead of checking the rest of the answers? Is that a good strategy to save time?
Technically, the answer is yes, but be careful how often you use this, and make sure you're doing a statistical analysis of how well it's working. If you go back and you're getting all those questions right...great. If you're missing just one...still probably great. If you're missing MORE than one, however, then it might be time to rethink it.