지구상에는 몇 개의 나라가 있는가?
The term "country" can refer to a sovereign state. There is no universal agreement on the number of "countries" in the world since a number of states have disputed sovereignty status. There are 206 sovereign states, of which 193 states are members of the United Nations, two states have observer status at the U.N. (the Holy See and Palestine), and 11 other states are neither a member or observer at the U.N. All are defined as states by declarative theory of statehood and constitutive theory of statehood. The latest proclaimed state is South Sudan in 2011.
206 sovereign states