Zuckerberg youngest among top 10 richest people
32-year-old Facebook CEO Mark Zuckerberg is the youngest among the world's ten richest people. He first appeared on the Forbes 400 list in September 2008 with a net worth of $1.5 billion at the age of 24. On Wednesday, Zuckerberg became the fifth richest person with his net worth touching an estimated high of $56.7 billion, surpassing Carlos Slim.