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Billion People Milestones - Statistics

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General Stats
  • This quiz has been taken 7 times
  • The average score is 5 of 8
Answer Stats
Population Year % Correct
8 Billion 2022
83%
5 Billion 1987
67%
6 Billion 1999
67%
7 Billion 2011
67%
1 Billion 1804
50%
2 Billion 1927
50%
3 Billion 1960
50%
4 Billion 1974
50%
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Score Distribution
Percent of People with Each Score
Percentile by Number Answered
Your Score History
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