Data Sufficiency — Number of M’s children Question: How many children does M have? Statements: I. H is the only daughter of X, who is the wife of M. II. K and J are brothers of M. Decide which statement(s) determine the number of M's children.

Difficulty: Easy

Correct Answer: Neither I nor II is sufficient

Explanation:

Assessment

Statement I: H is the only daughter of M's wife (X). This implies M has exactly one daughter, but he may have zero, one, or more sons. The total number of children is unknown.
Statement II: Tells about M's siblings (K and J), not M's children. Irrelevant to the question.

Combined
Even together, we only know there is one daughter; the count of sons (if any) is undetermined.

Final Sufficiency Choice
Neither I nor II is sufficient.

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