In 1850 how many of the 10 most populated cities were located in the state of that were part of the original 13 colonies

6,  Pennsylvania, Massachusetts, Maryland, South Carolina, New York, North Carolina ^^

early settlements on the subcontinent. both the indus and the ganges rivers carried rich silt from the mountains to the plains. when the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.

sounds good to me mate!