If this is for a specific "Multitest" (like those by Olympus), check the organizer's official archive section, where they often release "Архив заданий" (Task Archive) and "Ключи" (Keys) for past years. Sample Test Logic (Common Questions)
You can find PDF versions of 2017 geography exams and memorandums (answer keys) on Scribd and Studocu . otvety multitest po geografii 2017 goda 6 klass
Sites like Infourok often host archives of various school tests, including geography variants for Grade 6 with included answer keys. If this is for a specific "Multitest" (like