How many countries are there in the world in 2015?

How many continents are there 5 or 7? Is Canada located in the eastern or western hemisphere? What is the hemisphere and continent Orlando is located in the world? Which of the contiguous states borders the fewest number of other states? Which countries are located entirely in the northern hemisphere along the equator? Is China the largest continent in the world? What states border Connecticut on the north? Is map a person place or thing? London is on what continent? What continent is Persia in? What is the center on the Arctic region polar projection map? What is the continent of Naugatuck? What is the steppe between the Ural Mountains and the Aral Sea? When did the Himalayans mountains start to form? Where does rift valley start from? How many miles would it take to ctesiphon to rome? How are geographic information systems used? What name did Jansz give this new land? How can the lack of water affect development of a country? Differences between Thailand and the UK?

How many countries are there in the world in 2015?