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There are five rooms in my house — a hall, kitchen, study room, bedroom and dining room. There is one light in each room. Whenever the kitchen light is on, the study room light is off. Whenever the dining room light is on, the kitchen light is also on. Whenever the study room light is on, the hall light has to be on. How many lights, at the most, can be on simultaneously?
This question appeared in the PPSC Prelims 2021 examination (GS-II). It is Question 42 out of 80 questions in this paper.
This question was part of the PPSC Prelims 2021 (GS-II). The PPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all PPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.