According to Forbes latest annual billionaire list, there are 2153 billionaires across the globe. But the magazine notes a slight downward spiral in the list caused by the recent economic turbulence and the weak stock market.  The list, only for the second time in a decade, shrank both in the number of billionaires and their total net worth. The US and The Americas powered by Brazil are the only two regions who had more billionaires than last year. Despite the small slowdown, these super rich are poised to become ultra-rich in the coming years.

But they… including household names such as Bezos, Elon Musk, Warren Buffet How fast they made their first million? at what age did they cross the six-zero line? Slotsia, a UK based casino comparison site has the answer. They have done an extensive research with the help of information available online, and when they couldn’t establish an accurate age or time, they estimated it with the company’s milestones. Most of them (67%) are self-made and Zuckerberg is the only one in the top 10 under 50 years of age. For a deeper picture check out the infographic below.