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Question: On which day of the week is Ravi's birthday? Statement I: Ravi's mother remembers that his birthday is after Tuesday but before Friday. Statement II: Ravi's sister remembers that his birthday is not on Thursday. Which statement(s) is/are sufficient to answer the question?

Competition practiceData Sufficiency
  • AStatement I alone is sufficient but Statement II alone is not
  • BEither statement alone is sufficient
  • CStatement II alone is sufficient but Statement I alone is not
  • DBoth statements together are needed (neither alone is sufficient)

Step-by-Step Solution

Statement I narrows the birthday to Wednesday or Thursday. Statement II alone rules out only Thursday from all days. Together they give Wednesday, so both are needed but neither alone works.
Answer: D) Both statements together are needed (neither alone is sufficient)

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