Q 01/05

The United Nations marked the 'Day of Eight Billion' on 15 November of which year?

A) 2011

B) 2015

C) 2019

D) 2022

Answer · why

D) 2022

2022 was the year humanity passed eight billion, only eleven years after the seven-billion mark was reached.

Q 02/05

Which country, in the same year the world passed eight billion, recorded its first population fall since 1961?

A) Vietnam

B) China

C) Germany

D) Brazil

Answer · why

B) China

China's population fell that year for the first time since 1961, and the UN's 2024 forecast has it shrinking to 639 million by 2100, less than half it...

Q 03/05

Which country has the world's highest median age, with more than 29% of its people over 65 as of 2025?

A) Germany

B) Japan

C) Greece

D) Portugal

Answer · why

B) Japan

Japan's population is the oldest on Earth, its fertility rate of 1.2 is far below the 2.1 replacement level, and it is already shrinking.

Q 04/05

Which country's fertility rate fell to 0.72 births per woman in 2023, the lowest in the world?

A) Taiwan

B) Singapore

C) South Korea

D) Hungary

Answer · why

C) South Korea

South Korea's 0.72 is barely a third of the level needed to keep a population stable, and it has had the OECD's steepest fall in working-age populatio...

Q 05/05

Which continent has the youngest population in the world, with a median age of under 20 years?

A) Asia

B) Africa

C) Oceania

D) Europe

Answer · why

B) Africa

Africa's median age was 19.7 in 2012 against a world figure of 30.4, and its population is projected to pass 3.8 billion by 2100.