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Is T the brother of U? Statement I: U's mother has exactly two children, T and U. Statement II: T is the son of W, and U is also a child of W.

Competition practiceData Sufficiency
  • AEither statement 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
  • DBoth statements together are needed (neither alone is sufficient)

Step-by-Step Solution

Statement II says T is a son (male) sharing parent W with U, so T is U's brother. Statement I shows they are siblings but leaves T's gender unknown.
Answer: B) Statement II alone is sufficient but Statement I alone is not

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