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What is the present age of the son? Statement I: Five years ago, the father was five times as old as his son. Statement II: The father's present age is 45 years. Which statement(s) is/are sufficient to answer the question?

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

Step-by-Step Solution

I alone has two unknowns; with the father at 45, 40 = 5(son − 5) gives son = 13.
Answer: D) Both statements together are needed (neither alone is sufficient)

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