Analytical Example For Practice

The supervisor of a commuter airline is scheduling pilots to fly the round- trip from City X to City Y. The trip takes only two hours, and the airline has one round-trip flight in the morning and one round-trip flight in the afternoon, each day, Monday through Friday. Pilots must be scheduled in accordance with the following rules:

• Only W, X, and Y can fly the morning flight.  
• Only V, X, and Z can fly the afternoon flight.  
• No pilot may fly twice on the same day. 
• No pilot may fly on two consecutive days.
•  X must fly the Wednesday morning flight. 
• Z must fly the Tuesday afternoon flight.

Q.1  Which of the following must be true?

A. W flies the Monday morning flight X flies the B. Monday afternoon flight

C. Y flies the Tuesday morning flight 

D. W flies the Thursday morning flight  

E.  Z flies the Thursday afternoon flight

Q.2   If X flies on Friday morning, which of the following must be true?

A. X does not fly on Monday afternoon

B. flies on Friday afternoon

C. W flies Thursday morning  

D. Y flies Thursday morning

E.  Neither W nor Y flies Thursday morning

Q.3   If X flies only one morning flight during the week, which   

      of the following must be true?

A. W flies exactly two days during the week

B.  X flies exactly three days during the week

C.  Y flies only one day during the week

D.  Z flies Monday afternoon and Friday afternoon

E.  X flies more times during the week than V

Q.4  If W is not scheduled to fly at all during the week, all of the following must be true EXCEPT

A. X flies on Monday mornings 

B. V flies on Monday afternoon Y C. flies on Thursday morning

D.  Z flies on Friday afternoon

E.  X flies on Friday morning 

Answer: 

1. E

2. B

3. A

4. D