19 years old Norwegian Teenager Alexandra Andresen  has been named the official youngest billionaire in the world this month with a $1.2 billion (£862 million) fortune, after she was required to declare her finances to Norway’s taxman when she hit adulthood.Her fortune comes from her father Johan Andresen, who transferred 42% of the stock in Ferd, the family’s centuries-old private-investment company, to […]