Civil Service Exam Reviewer · Logical Reasoning · hard
Data sufficiency: On what day of the week did March 1 fall? (1) February 1 of the same year was a Monday. (2) That year was not a leap year. Which of the following is correct?
- Statement (1) ALONE is sufficient, but statement (2) alone is not.
- Statement (2) ALONE is sufficient, but statement (1) alone is not.
- BOTH statements TOGETHER are sufficient, but NEITHER alone is.
- The statements are NOT sufficient, even when taken together.
Answer
C. BOTH statements TOGETHER are sufficient, but NEITHER alone is.
Solution
The answer is: BOTH statements TOGETHER are sufficient, but NEITHER alone is. (1) alone: March 1 depends on whether February had 28 or 29 days. (2) alone gives no starting day. Together: February had 28 days (exactly 4 weeks), so March 1 was also a Monday — sufficient.
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