SortStack #2021 — 2031-12-21

By population · Order from fewest to most people.

1. Sitting United States senators 100

   Two per state since 1789 — the chamber only grows when a new state joins the union.

2. Residents of the island nation of Niue 1.9K

   One of the world's largest coral islands, and the first country fully covered by free Wi-Fi.

3. People who have ever stood on the summit of Mount Everest 6.9K

   Kami Rita Sherpa has been up more than 30 times — roughly one in every 230 summits is his.

4. Ancient Rome at the height of the empire 1M

   No European city reached a million residents again until London, around 1800.

5. Natural redheads worldwide 140M

   Just one to two percent of humanity; the gene is recessive, so it can skip generations.

6. The European Union, all member states combined 449M

   Twenty-seven countries, twenty-four official languages, one market.

← All puzzles · Play today’s SortStack