How many countries were in the world in 1939?

Who was elected president of the Indian National Congress three times? What was developed by the Chinese? Why is the triangular trade route called triangular trade route? What is the umbrella used for? Why were there other crusades if the crusaders won the first one? How many continents were there originally? How was the creation of the national assembly and the storming of the Bastille? What were the most important items traded in the 1400s? How did Mary Queen of Scots and Queen Elizabeth influence the world you live in today? How do you spell yoa ming? From what source area did the great number of African slaves destined for the New World emanate during the period 1701-1810? Why did Europeans get slaves from Africa? Advantages of colonisation? What was the British reaction to this Reign of Terror? What was one shilling worth in world war 2? What scientists are buried in Westminster Abbey? Why was fur important to french explorers? Lasting reforms of the French Revolution? How do you say 1791 in french? What type of government did the national assembly try to create?