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What is the present age of the son? Statement I: The father's present age is 40 years. Statement II: The father is 4 times as old as his son at present. Which statement(s) is/are sufficient to answer?

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

Step-by-Step Solution

I gives only the father's age; II gives only the ratio. Together, 40 = 4 × son, so the son is 10 years old.
Answer: A) Both statements together are needed (neither alone is sufficient)

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