Consider the following countries: I. Bolivia II. Brazil III. Colombia IV. Ecuador V. Paraguay VI. Venezuela Andes mountains pass through how many of the above countries?

The Andes mountain range runs through seven South American countries: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina. From the listed countries, the Andes pass through Bolivia, Colombia, Ecuador, and Venezuela — that is four countries. Brazil and Paraguay do not have the Andes passing through them. Hence the correct count is four.