Problem: Determine the topic of the passage. "Maya numerals are a vigesimal ( base - twenty ) numeral system used by the Pre-Columbian Maya civilization ." Topic:

A: Maya numerals


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


Problem: Determine the topic of the passage. "Vitamin A has multiple functions, it is important for growth and development, for the maintenance of the immune system and good vision." Topic:

A: Vitamin A


Problem: Determine the topic of the passage. "He is most popularly regarded as the eldest son, though some traditions regard him as the second son." Topic:

A:
Shem