A life-expectancy test predicts someone's age of death based upon their answers to questions about their general health history, according to Time.com. The test also gives respondents an age range for how long they are likely to live.
University of Pennsylvania researchers Lyle Ungar and Dean Foster created one of the most popular and most accurate life-expectancy tests, using only eight questions, notes Time. Their questions focus on exercise habits, whether or not the person smokes, and how much he drives. The test also asks about current age, race and martial status.
More detailed life-expectancy tests feature questions relating to dietary habits, stress-coping methods and work environment, adds Market Watch.