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Plain Daily Game

Data sources

Data version 2026-11-12.1, imported 2026-11-12. Regional aggregates such as “World” or “Euro area” are excluded from country lists.

World Bank World Development Indicators

Licence: CC BY 4.0

Reference: 2023

NASA Planetary Fact Sheet (NSSDCA)

Licence: Public domain (U.S. Government work)

Reference: Fact Sheet

PubChem Periodic Table

Licence: Public domain (NCBI)

Reference: PubChem

Name categories

  • PopulationWorld Bank World Development Indicators · 2023 · 217 answers
  • Land areaWorld Bank World Development Indicators · 2023 · 215 answers
  • GDP (current US$)World Bank World Development Indicators · 2023 · 204 answers
  • GDP per person (current US$)World Bank World Development Indicators · 2023 · 204 answers
  • Forest areaWorld Bank World Development Indicators · 2023 · 210 answers
  • Urban populationWorld Bank World Development Indicators · 2023 · 217 answers
  • Atomic massPubChem Periodic Table · PubChem · 103 answers
  • Melting pointPubChem Periodic Table · PubChem · 103 answers
  • DensityPubChem Periodic Table · PubChem · 96 answers

Estimation questions

  • 130 questions from World Bank World Development Indicators
  • 102 questions from NASA Planetary Fact Sheet (NSSDCA)
  • 182 questions from PubChem Periodic Table