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A is older than B, but younger than C. D is the youngest. Who is the oldest?
A
B
C
D
C
Translate the statements into an inequality string: A > B and C > A. Combining these yields C > A > B, and since D is the youngest, the sequence is C > A > B > D.
Translate the statements into an inequality string: A > B and C > A. Combining these yields C > A > B, and since D is the youngest, the sequence is C > A > B > D.
Analyze Age Relations
A is older than B translates to A > B. A is younger than C translates to C > A.
Combine Constraints
Merging A > B and C > A gives the sequence C > A > B.
Include Final Element
D is the youngest, meaning D is smaller than everyone else in the sequence, resulting in C > A > B > D.
A is incorrect because A is younger than C; B is incorrect because B is younger than both A and C; D is incorrect because D is explicitly stated as the youngest.
C is correct because the combined sequence C > A > B > D shows that C occupies the position of the oldest person.
For ranking problems, always write the 'greater than' sign consistently (e.g., all > or all <) to avoid flipping the order by mistake.