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Directions: Study the information carefully and then answer the question: P, Q, R, S, T, U and V are seven professors. Each one teaches a different subject from Physics, Chemistry, Biology, English,…

Question and options

Directions: Study the information carefully and then answer the question:
P, Q, R, S, T, U and V are seven professors. Each one teaches a different subject from Physics, Chemistry, Biology, English, Mathematics, Economics and Geography, but not necessarily in that same order. Each of them teaches one day each on the seven days of the week from Monday to Sunday not necessarily in the order. R teaches Biology on Friday. Q teaches Mathematics on the previous day of the day on which professor teaches Physics. V teaches on Sunday, but does not teach Chemistry or English. S teaches Economics on the previous day on which U teaches. P teaches Geography on Tuesday. T does not teach English.

Which subject does U teach?
  1. English
  2. Mathematics
  3. Physics
  4. Data inadequate

Answer and explanation

Correct answer: A - English
P teaches Geography on Tuesday, R Biology on Friday and V on Sunday, leaving Monday, Wednesday, Thursday and Saturday for Q, S, T and U. S (Economics) must teach the day before U, and the only two consecutive days that are both free are Wednesday and Thursday, so S is on Wednesday and U on Thursday. Q (Mathematics) must teach the day before the Physics teacher; Monday is followed by P (Geography), so Q is on Saturday and V, on Sunday, teaches Physics, leaving Monday for T. T and U are left with Chemistry and English, and T does not teach English, so U teaches English.

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