Meet the world’s youngest billionaires. According to Forbes magazine, of the world's 1,426 billionaires, there are 29 under the age of 40. These 29 young billionaires are worth a total of $119 billion. Ten of them have built their fortunes in the technology sector(four at social networking giant Facebook) and several others are heirs to massive fortunes. Here is a selection of the very richest of these enviably successful and minted youngsters.
Mark Zuckerberg (Age 28. Net Worth: $13.3 billion)