They are young, dynamic and enterprising... Meet the world's 20 youngest billionaires according to the Forbes 2012 list. 1. Mark ZuckerbergAge: 27 Net Worth: $17.5 billion Mark Elliot Zuckerberg......
They are young, enterprising and successful. Out of the world's 1,426 billionaires in the Forbes list, there are 29 people under 40 years old. These 29 young billionaires have a total of $119......