New 5000+ Questions, 500+ Levels, 20 Categories. Global Leaderboard. Extreme General Knowledge Quiz will let your learn and Test about GK with following Subjects. World's: Largest, Highest, Longest, Tallest, Fastest, Busiest, Most popular, Lowest, Smallest, Deepest etc. Etc. It includes the questions from World Geography, History, Capital, General Knowledge, Constructions.