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On which date of the month was the exam held? Statement I: The exam was held after the 13th but before the 16th of the month. Statement II: The exam was held on an odd-numbered date.

Competition practiceData Sufficiency
  • AEither statement alone is sufficient
  • BStatement I alone is sufficient but Statement II alone is not
  • CBoth statements together are needed (neither alone is sufficient)
  • DStatement II alone is sufficient but Statement I alone is not

Step-by-Step Solution

Statement I allows the 14th or 15th; statement II (odd date) allows many dates. Together, the only odd date between the 13th and 16th is the 15th.
Answer: C) Both statements together are needed (neither alone is sufficient)

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