Studying Centenarians trivia is interesting, because it is possible that the once rare occurrence of living to a hundred years of age will become much less uncommon in the future. Doctors predict that the increase in medical technology is beginning to reach a point where very subsequent generations are born with a longer life expectancy, and many predict that there will become a time that living to a hundred will become the norm, rather than the exception.

Certainly, a centenarians quiz will show that it has become much more common for people to live to this age, especially in developed countries where they have access to the very best that modern medicine can offer them. In 2008, the United States was estimated to have over 95,000 centenarians, the most of any country in the world. Japan has the second highest number, and people in Japan generally have a very long life expectancy.

Centenarians trivia will show that the country with the highest percentage of people who have lived to be a hundred years of age is France, with the US and Japan shortly behind them. There are practices in these countries relating to diet and lifestyle which many believe contribute to the longer lifestyles. In France, the climate, moderate consumption of Red Wine, and diet are leading factors, as is the Japanese diet.

Many countries honor their centenarians proudly when they reach their hundredth year. A centenarians quiz will point out that the UK, the US, and Japan all have traditions along these lines. The President sends letters to people on their hundredth birthdays in the US, and the Queen in England. The Prime Minister of Japan sends a certificate and a sliver cup. The Japanese have a strong support for their elders in their culture, and even have a "Respect for the Aged" day.

Longevity experts show that the number of people making it to 100 has been increasing rapidly, and expect it to continue to do so. Since the mid twentieth century, almost ten times as many people worldwide are living to a hundred. This has to do not only with increases in medical technology, but also the development of previously undeveloped countries, allowing residents of those countries access to the standards of health care in place in the rest of the world.

Factors which contribute to long life include genetics, diet, environment, and stresses. Education, personality, and lifestyle have also been linked directly to the length of life.