Question: who is the youngest richest man in the world?
Answer: Kylie Jenner. Age: 23. Net worth: $1B. ... 
and 3.: Sisters Alexandra Andresen and Katharina Andresen. Respective ages: 24 and 25. Net worth: $1.1B each. ... 
Gustav Magnar Witzoe. Age: 27. Net worth: $2.3B. ... 
Jonathan Kwok. Age: 28. ... 
John Collison. Age: 30. ... 
Evan Spiegel. Age: 30 years. ... 
Patrick Collison. Age: 32 years. ... 
Bobby Murphy. Age 32.