If you think it's tough to make ends meet in your city, consider what it takes to come out ahead in the world's most expensive cities. Perhaps you live in one of them and know all too well about the pricey cost of living.
Mercer's 2009 Worldwide Cost of Living survey results were released this week and the rankings this year have shifted from last year's survey. What do you know about the most expensive places to live in the world? Take the quiz!