Considerable attention has fallen lately on RealAge, a wildly popular online questionnaire that claims to calculate your body's true age by factoring in your diet, medical history, exercise habits and less obvious indicators of longevity like how many close friends you have. Critics complain that the test is used by pharmaceutical companies to identify potential customers and bombard them with e-mailed ads.
No one, though, has warned about the danger inherent in the questionnaire itself: the mere act of slogging through its more than 85 questions could subtract years from your life. And the test gives short shrift to the adage "You're as young as you feel" -- few questions address what might be thought of as one's mental age. Below, a more focused quiz that should save you precious hours:
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