How many US presidents were born as British subjects?
The following Presidents were born British subjects before the establishment of the United States: George Washington, John Adams, Thomas Jefferson, James Madison, James Monroe, John Quincy Adams, Andrew Jackson, William Henry Harrison. So, eight American presidents were British subjects before the independence.
The following two Presidents enjoyed dual citizenship at birth -- i.e. they were born British subjects, as well as American citizens, after the establishment of the United States: Chester A. Arthur, Barack Obama.
The right answer to this question is ten.