Solve 20 of the hardest Math questions that will appear on SAT/ACT. If you can solve these questions, it will go a long way in mastering the Math Section.
The worksheet can be downloaded from this link: https://www.erikthered.com/tutor/sat-math-hard-practice-quiz.pdf
The free pdf copy of the SAT Secrets ebook contains the following information:
The Guide is Written by Ellen Valladares: Ellen Valladares is an award-winning author, freelance writer, and college essay coach. Her students have been admitted to top-rated schools such as Duke, Cornell, Vanderbilt, Brown, University of Michigan, and many more.