15) Huiyan Yang (Age: 32; Net worth: $5 billion)

Huiyan Yang is the daughter of Yeung Kwok Keung, the founder of real estate developer Country Garden Holdings. Yeung Kwok Keung transferred his holdings to his daughter in 2007.

14) Eduardo Saverin (Age: 32; Net worth: $4.8 billion)

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Eduardo Saverin is one of the founders of social media company Facebook. Currently he lives in Singapore where he has been making investments in international technology startups. Saverin also co-founded Los Angeles-based private equity firm Velos Partners. His investments include high-end airport car rental service Silvercar and Hampton Creek Foods.