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In a family, what is the age difference between A and B? Statement I: A is 6 years older than C. Statement II: C is 4 years younger than B.

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

Step-by-Step Solution

I links A to C, II links B to C. Together A = C + 6 and B = C + 4, so A is 2 years older than B; neither alone relates A and B.
Answer: A) Both statements together are needed (neither alone is sufficient)

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