Five friends, P, Q, R, S, and T, attended a series of five conferences in different cities: New York, London, Tokyo, Paris, and Sydney. Each friend attended a conference in a different city, and they attended the conferences on different days of the week: Monday, Tuesday, Wednesday, Thursday, and Friday. We have the following information about which person attended which conference and on which day:
1. P attended the conference in Sydney
2. T attended the conference on Friday and Q attended the conference in Paris.
3. The person who attended the Tokyo conference did so on Wednesday.
4. S and Q attended the conference on consecutive days and none went to Tokyo.
Solution
We have the following table to fill according to the arrangement:
According to the statement 2, T attended the conference on Friday but not in New York and Q attended the conference in Paris
Further, statement 3 says that the person who attended the Tokyo conference did so on Wednesday.
Now, according to statement 4, S and Q attended the conference on consecutive days and none of them attended the conference on Tokyo. Therefore, none of them would have attended the conference on Wednesday. Hence, they attended the conference on Monday and Tuesday or they attended on Thursday and Friday.
However, T attended the conference on Thursday and Friday. Hence, S and Q must have attended the conference on Monday and Tuesday.
According to statement 1, P attended the conference in Sydney, he must have attended the conference on Thursday. Hence, R is left so he/she must have attended the conference on Wednesday in Tokyo.
Now, we are left with S and T to uniquely identify the locations. The remaining locations are London or New York so they must have attended at one of the location.
With this, we have the following table:
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