Population Basics: Four Difficulties, 4000 Levels
Population Basics has four difficulties with 1000 levels each and ten questions per level; check structure before choice. Population levels focus on births, deaths and migration. For each rate, name the denominator and the period before interpreting the number.
人口基础闯关Population Basics1000 关人口基础进阶闯关Population Intermediate1000 关人口基础高阶闯关Population Advanced1000 关人口基础挑战闯关Population Challenge1000 关
How it works
- Start at the basic difficulty.
- Ten questions per level; clear one to unlock the next.
- Review at 1/3/7/14/30 days.
FAQ
Which difficulty?
Start at basic and move up when accuracy stays above 80%.
How many levels each?
1000.