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How Many Watchtowers does the Great Wall of China have?
June 20, 2013
Author: Bulent Yozgat
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How Many Countries Are Using the F-16 Fighting Falcon in the world?
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How Many World Cup Tournaments are there up to now?
June 19, 2013
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How Many Computer System Manufacturers in the World?
June 16, 2013
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How Many Currencies Are There in the World Today?
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