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What is A's present age? (I) Five years ago, A was twice as old as B. (II) B is now 20 years old and A is 5 years older than B.

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

Step-by-Step Solution

II gives A = 20 + 5 = 25 directly. I is one equation in two unknowns and is insufficient.
Answer: C) Statement II alone is sufficient but Statement I alone is not

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