MO Z9-I-3 2018
In our town there are three cinemas, which are named according to the compass points. About their opening hours it is known that:
• every day at least one cinema is open,
• if the southern cinema is open, then the northern cinema is not open,
• the northern and eastern cinemas are never open at the same time,
• if the eastern cinema is open, then either the southern or the northern cinema is also open.
We went to the southern cinema and found that it is closed. Which of the remaining cinemas is certainly open?
• every day at least one cinema is open,
• if the southern cinema is open, then the northern cinema is not open,
• the northern and eastern cinemas are never open at the same time,
• if the eastern cinema is open, then either the southern or the northern cinema is also open.
We went to the southern cinema and found that it is closed. Which of the remaining cinemas is certainly open?
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