Have you ever think about why we have difference in the values of the currencies? Today, in Sri Lanka we can sell 1 USD for about 181 LKR . OMG ! What a huge difference? How this occurs? Have you think about it? Who are responsible for these differences? Let us have a look on it briefly. Let us assume that there are two countries, Country-A and Country-B. Both have 1 kg (1000 g) of Gold (say). Due to their mutually exclusiveness, they may have difference currencies (Currency-A is in Country-A and Currency-B in Country-B). Under the supervision of IMF , initially they print currencies with total value of 1000. The face value of notes shall be differ in both countries but the total face value should be 1000.00 units (Currency-A or Currency-B). That is, Country-A can print 1000 notes with face value 1.00 in each while Country-B can print 2000 notes with face value 0.50 in each. This can differ for country to country. In this case, each country prints currency value 1.00