Attached is the document excerpt from the SC1000, hard questions only with explanations/notes provided in Hide Text function.
So far I've gone through the first 100 questions (Q1-Q100) with detailed review of 20 hard ones that I got wrong while practicing.
Gonna have other 100 question sets reviewed and noted soon. Hope you guys will find it helpful.
Update: the second 100 question block (Q101-Q200)is reviewed and updated in the attachment. Try to make it at least a block a day.