I am looking for multiple choice question (MCQ) based tests on some Mathematics' topics (details below), which could be downloaded in most preferably tex (LaTex) format or doc/docx format. Kindly please share any info on this if you have. Please do mention services or websites with payment as well.
I particularly need Linear Algebra and Multivariable Calculus (undergrad level) and basic Group Theory (undergrad level).
Any help would be gratefully appreciated.