Is this the card game Higher or Lower?

No. The card game asks about the next playing card, and the drinking game is a party version of it. Here you compare real-world numbers, ten rounds a day, the same for everyone.

Where do the numbers come from?

From Wikidata, the free knowledge base, rounded the way an atlas prints them. Populations show the year of the count.

Strategy guide

Higher or lower: how to call the numbers

Our higher or lower game, also known as the more or less game, compares world numbers: how many people live in a country, how big it is, how high a mountain rises and how long a river runs. It is not the card game or the drinking game of the same name. Every number comes from Wikidata, and a few reference points win more rounds than any trick.

Know the range of each deck

Each round compares two cards from one deck. Knowing a deck's smallest, middle and largest card tells you which half of the range a card sits in, and that alone decides the early rounds.

Deck	Cards	Smallest	Middle card	Largest
Population	149	Djibouti 1,000,000	14,000,000	India 1,500,000,000
Area	162	Lebanon 10,500 km²	238,000 km²	Russia 17,100,000 km²
Height	68	Table Mountain 1,085 m	4,478 m	Mount Everest 8,849 m
Length	80	Neva 74 km	1,810 km	Nile 6,650 km

The first rounds are far apart, the last ones close

The game sets the gap on purpose. The first round of a run aims for numbers three or more times apart; the last ones can be as close as 12% apart. Answer the first rounds quickly and keep your thinking for the end.

2,918 mMount Olympus
8,849 mMount Everest

28,000,000Cameroon
20,000,000Kazakhstan

From an unlimited run. Round 1 (Height): the second card is 3.0 times the first, higher. Round 10 (Population): only 1.40 times, lower.Position from unlimited board #1

Area is not population

The population and area decks share their countries, and the most common slip is to answer one with the other in mind. Deserts, ice and forest hold few people; river plains and deltas hold many.

52,000,000South Korea100,000 km²
3,400,000Mongolia1,560,000 km²

The deck's sharpest case: South Korea has 15.3 times as many people as Mongolia, and Mongolia has 15.6 times the land.

Mountains and rivers come in families

Every peak above 8,000 m stands in the Himalaya or the Karakoram; the Andes top out just below 7,000 m; the highest Alps stay under 4,810 m. Rivers follow their basins: a river that drains half a continent is long, while a famous river through a capital city can be short.

Questions

Is this the card game Higher or Lower?: No. The card game asks about the next playing card, and the drinking game is a party version of it. Here you compare real-world numbers, ten rounds a day, the same for everyone.
Where do the numbers come from?: From Wikidata, the free knowledge base, rounded the way an atlas prints them. Populations show the year of the count.