PrepTest 83, Section 1, Question 23

Difficulty:

An environmental consultant will examine the air quality on eight floors of an office tower, the first floor to the eighth floor. Each floor will be examined on one of four consecutive days—Wednesday, Thursday, Friday, and Saturday—with exactly two floors being examined on each day. The following conditions apply:

On any given day, the two floors examined must be separated by at least one other floor.

The second floor must be examined on an earlier day than the eighth floor.

The third floor must be examined on an earlier day than the seventh floor.

The seventh floor must be examined on an earlier day than the fifth floor.

The fourth floor must be examined on either Thursday or Friday.

Question

Which one of the following, if substituted for the condition that the fourth floor must be examined on either Thursday or Friday, would have the same effect in determining the schedule for the air-quality examination?

The fourth floor and the seventh floor must be examined either on the same day as each other or on consecutive days.

The fourth floor cannot be examined on an earlier day than the second floor or on a later day than the eighth floor.

The fourth floor must be examined on an earlier day than the fifth floor.

If the fourth floor is not examined on Thursday, the seventh floor must be examined on Thursday.

If the third floor is examined on Thursday, the fourth floor must be examined on Friday.

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