There are at least 7,102 known languages still spoken in the world today. Many of these languages are spoken only by a very small number of people and may become extinct soon. We wonder: How many languages are spoken as a mother tongue by at least 50 million people?
A. More than 800
B. More than 400
C. More than 100
D. More than 20
China, India and the United States currently are the world’s three most populous nations. By 2060, they will rank in second, first and fourth place, respectively. We wonder: Which country will have taken the current place of the United States to have the world’s third-largest population in 2060?
Nigeria is Africa’s most populous country by far. It has nearly double the population size of the second-largest country. Its 182 million people in 2015 make it the world’s seventh most populous nation. We wonder: After Nigeria, which is Africa’s next most populous country?
A. South Africa
B. The Democratic Republic of Congo
Polio was a global scourge as recently as three decades ago. Since then, it has been on the decline worldwide. Polio has now been eradicated in the wild from all but two countries. We wonder: Which countries still have not halted transmission of polio from the wild?
D. Nigeria Continue reading
Africa’s most populous country, Nigeria, is forecast to see its population increase at a remarkably high rate in coming decades. We wonder: In terms of population size, which entire region of the world will Nigeria overtake by 2100?
A. North Africa
B. North America
D. All of the above
Each year, the World Bank scores the world’s governments on 10 key factors that contribute to (or inhibit) the smooth and simple conduct of business operations in their countries. Which of these major emerging market economies ranks worst on “Ease of Doing Business”?
The group of the world’s 20 largest economies is not static. Over time, some countries are bound to move into this elite club, while others may drop out. We wonder: Which countries are projected to make the greatest upward move among the world’s top 20 economies?
The end of the U.S. Civil War, now exactly 150 years ago, meant freedom for four million slaves in the American South. Remarkably, slavery in its modern form — human trafficking, forced labor and forced marriages — continues to exist throughout the world. We wonder: Which country today has the largest number of unfree people?
Americans are known to have an energy-intensive lifestyle, with the average citizen consuming over 13,000 kilowatt-hours of electricity per year. But in Nigeria, one of Africa’s largest economies, power consumption is dramatically lower. We wonder: Which of the following common appliances uses about as much electricity in a year as the average Nigerian?