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How well do you know world demographics?

Guess the real numbers behind world population and demographics, see how everyone else guessed, and get the source.

Guess the statOne tap · see how everyone guessed

In what year did Belgian scholar Achille Guillard formally define the term 'demography'?

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demographics and world population
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Today's round

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1755

In what year did Benjamin Franklin publish an early essay on population growth in the American colonies?

Franklin's essay is considered an early contribution to demographic thinking about growth rates.

Source: Wikipedia (2025) en.wikipedia.org

1771

In what year is Richard Price credited with writing the first textbook on life expectancy tables?

Life tables like Price's became essential tools for insurance and demographic analysis.

Source: Wikipedia (2025) en.wikipedia.org

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How does DemoSurvey.com work?

Each question asks you to guess a real number about demographics and world population. After you answer you see how everyone else guessed, then the real figure and where it comes from.

How is the daily round scored?

Four stats and one opinion poll. A correct guess earns 100 points plus up to 50 for speed, with a combo bonus for answers in a row. The range next to the right answer earns 40. Opinion polls earn 25 for having your say, and nailing every stat adds 150.

Where do the numbers come from?

Every stat links to its source, such as government statistics agencies, research organizations and industry groups. Figures are checked against the source before they go live.

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