90+ severely tough questions are asked in the practice quizzes online on erpprep.com. I once came across them on demo test online and thinking them to be easy and simple, instantly signed up for them. I did not know what was in store for me and it created a havoc in practice sessions. However, the C_SECAUTH_20 practice tests prepared me for worse and it became actually easy for me. I am 91% scorer in the recently concluded SAP System Security and Authorizations certification exam.