Problem: Determine the topic of the passage. "Diagnosis is based on observed behavior and the patient's reported experiences." Topic:

A: Schizophrenia


Problem: Determine the topic of the passage. "A mathematical constant is a special number , usually a real number , that is "significantly interesting in some way"." Topic:

A: Mathematical constant


Problem: Determine the topic of the passage. "The first U.S. Secretary of the Treasury (1789–95), Alexander Hamilton , is currently featured on the obverse of the bill, while the U.S. Treasury Building is featured on the reverse ." Topic:

A: United States ten-dollar bill


Problem: Determine the topic of the passage. "The kilobar, which is to say 1000 grams in mass, is the bar that is more manageable and is used extensively for trading and investment." Topic:

A:
Gold bar