Architecture primarily involves design of buildings. The scale of activity ranges from furniture design to city form and from community involvement and social change to development and technical research. Architects engage in activities ranging from conceptual problem solving to project management. Architects deal with a range of knowledge including design, technology, social requirements, business practices, and legal matters. Anybody who has studied Physics, Mathematics and Chemistry at the 10+2 level can apply for admission to study architecture at the graduate level in colleges offering the course. B.Arch is a 5 year course and most schools and colleges select students through a written test. Further on completion of the graduate course, if interested, one can study architecture at the post graduate course which varies from 18 months to 2 years. The Council of Architecture conducts an aptitude test on an All India basis for admission to colleges of Architecture. Engineering colleges select students on the basis of the result to the appropriate engineering courses. Some other renowned institutes carry their own selection tests to identify suitable candidates while some give weightage to class 12 marks and entrance examinations to select students.