Which country has the largest population in the world?

India, which overtook China as the world's most populous country in 2023 according to United Nations data. Many older sources and outdated trivia lists still list China as the answer, making this one of the general knowledge facts most likely to trip people up simply because it changed relatively recently.

Is the Nile or the Amazon the longest river in the world?

The Nile is traditionally cited as longest, at roughly 6,650 kilometers. Some surveys measure the Amazon as longer, and the honest answer depends on exactly where each river's source is defined, a genuinely unresolved measurement question rather than a simple factual error on either side.

How should you actually study a general knowledge list like this?

Cover the answer column before reading it, answer out loud, and mark only the questions you got wrong. Reading a question alongside its answer trains recognition, which you already have. Producing the answer from memory tests recall, which is the skill that actually fails in conversation and in exams. Come back to just your misses a week later for the retention to actually stick.

Do sharks really have no bones at all?

Correct, a shark's entire skeleton is made of cartilage, the same flexible material as a human ear or nose tip, confirmed by the Natural History Museum. The only part of a shark not made of cartilage is its teeth. This surprises most people since sharks are often pictured as having rigid, bone-like structures given their size and strength.

General Knowledge Questions and Answers: The Top 40

Q: What are the 10 most commonly asked general knowledge questions?

The capital of Australia (Canberra), the chemical symbol for gold (Au), the number of bones in an adult body (206), the author of Romeo and Juliet (Shakespeare), the largest human organ (skin), the largest planet (Jupiter), the smallest country (Vatican City), the painter of the Mona Lisa (Leonardo da Vinci), the year World War Two ended (1945), and the hardest natural substance (diamond).

Reading a question and its answer together only trains recognition, the feeling that you'd have known it if asked. That feeling is unreliable. Producing the answer from memory, before you check it, is the version of this that actually works.

Below are 40 general knowledge questions, opening with the 10 most commonly asked, then grouped by science, history, geography, culture, and money. Cover the answer column before reading it, say your answer out loud, and mark only the ones you got wrong. Those misses are the only part of this list worth revisiting.

Key Takeaways
Morso turns any topic into 5-minute lessons you'll actually finish. Try it free →
Students who test themselves on material retain significantly more of it a week later than students who only reread it, even with identical study time (Roediger and Karpicke, 2006)
Several "settled" general knowledge facts are more contested than they look: whether the Nile or the Amazon is longer genuinely depends on where each river's source is measured
India overtook China as the world's most populous country in 2023, according to United Nations data, a fact many older sources still get wrong
The questions you miss are more valuable than the ones you already knew. Reviewing a fact you got wrong, and coming back to it a week later, is what actually moves it into long-term memory

What Are the 10 Most Commonly Asked General Knowledge Questions?

These show up more than any others, in interviews, entrance exams, and casual conversation alike. Cover the answer column before you read it.

#	Question	Answer
1	What is the capital of Australia?	Canberra, not Sydney. It was purpose-built as a compromise between Sydney and Melbourne
2	What is the chemical symbol for gold?	Au, from the Latin aurum
3	How many bones are in the adult human body?	206. Infants are born with roughly 270; many fuse during growth
4	Who wrote Romeo and Juliet?	William Shakespeare, around 1595
5	What is the largest organ in the human body?	The skin
6	Which is the largest planet in the Solar System?	Jupiter
7	What is the smallest country in the world?	Vatican City, under half a square kilometer
8	Who painted the Mona Lisa?	Leonardo da Vinci
9	In which year did the Second World War end?	1945
10	What is the hardest naturally occurring substance?	Diamond

What Are Some Science and Nature Questions?

Question	Answer
Which gas do plants absorb during photosynthesis?	Carbon dioxide
What is the speed of light in a vacuum?	299,792,458 meters per second, an exact figure by international definition
What is the most abundant gas in Earth's atmosphere?	Nitrogen, at roughly 78%
What is the chemical formula for water?	H2O
How many chambers does the human heart have?	Four: two atria and two ventricles
What is the human body's largest internal organ?	The liver
How many bones does a shark's skeleton contain?	None. A shark's skeleton is made entirely of cartilage
What is the chemical symbol for sodium?	Na, from the Latin natrium

What Are Some History Questions?

Question	Answer
Who was the first person to walk on the Moon?	Neil Armstrong, in July 1969
In which year did the Berlin Wall fall?	1989
Who was the first President of the United States?	George Washington
In which year did the Titanic sink?	1912, on her maiden voyage
Which ship carried the Pilgrims to America in 1620?	The Mayflower
Which civilization built the pyramids at Giza?	Ancient Egypt
Julius Caesar was a leader of which empire?	Rome

What Are Some Geography Questions?

Question	Answer
What is the largest ocean on Earth?	The Pacific
What is the smallest continent by land area?	Australia
Which country has the largest population?	India, which overtook China in 2023, according to United Nations data
Mount Everest sits on the border of which two countries?	Nepal and China
What is the capital of Canada?	Ottawa
Which continent has no permanent population?	Antarctica
What is the longest river in the world?	Traditionally the Nile, at about 6,650 km. Some surveys measure the Amazon as longer, and the honest answer depends on where each river's source is defined

What Are Some Arts, Language, and Culture Questions?

Question	Answer
Who wrote 1984?	George Orwell
How many keys does a standard piano have?	88
How many strings does a standard guitar have?	Six
Which language has the most native speakers?	Mandarin Chinese
In which city is the Louvre?	Paris
Who composed the symphony containing "Ode to Joy"?	Ludwig van Beethoven, in his Ninth Symphony

What Are Some Money and Economics Questions?

Question	Answer
What does GDP stand for?	Gross Domestic Product, the total value of goods and services a country produces
What is inflation?	A general rise in prices over time, which reduces what each unit of currency can buy
What is the currency of Japan?	The yen
What does an interest rate represent?	The cost of borrowing money, expressed as a percentage of the amount borrowed
What is compound interest?	Interest calculated on the original amount plus all previously accumulated interest

Bar chart showing testing yourself produces 61% retention after one week versus 40% for rereading, based on Roediger and Karpicke 2006, both groups studying for equal time

How Should You Actually Use a List Like This?

Reading this list top to bottom and nodding at the answers you knew produces almost nothing. It only works as retrieval practice.

Cover the answer column before reading it. Reading a question and its answer together trains recognition, a skill you already have, not recall, which is what actually fails you in a real conversation or an exam. Answer out loud rather than silently, since committing to a spoken answer exposes overconfidence that silent thinking hides. Mark only the questions you missed. Everything you already knew was already yours; the misses are the only useful output of this exercise. Come back to just the misses a week later, since spaced review is what moves a fact from short-term recognition into long-term memory. Roediger and Karpicke's landmark 2006 study found students who tested themselves on material retained 61% of it a week later, compared to 40% for students who only reread the same material, with both groups spending identical time studying.

For the deeper research behind this mechanism, see active recall: what it is and why it works.

How Do You Build General Knowledge Beyond a List?

A list like this diagnoses gaps. It doesn't fill them. Filling a gap you found here means going one level deeper on the specific fact that stumped you, not just memorizing the corrected answer.

For subject-specific depth, see science trivia questions and movie trivia questions and answers. And for a genuinely useful reframe on why some facts feel harder to hold onto than others, the hardest trivia questions breaks difficulty down by type, obvious answers that are wrong, facts that require connecting two things, and myths that have spread wider than the truth, which is a more useful lens than just calling a fact "obscure."

If a specific miss from the list above is worth understanding properly rather than just memorizing, Morso turns it into a structured lesson in about 30 seconds, explained through analogy so it connects to something you already know. Try it free on any topic.

The Bottom Line

Forty questions won't make you broadly informed. What they will do, in about ten minutes, is show you exactly which parts of general knowledge you can't currently talk about with confidence.

That list of misses is worth more than the list of things you already knew. Review each one you missed a week from now, and the gaps close faster than a single read-through would suggest.

Sources

Roediger, H. L. and Karpicke, J. D. (2006). Test-Enhanced Learning: Taking Memory Tests Improves Long-Term Retention. Psychological Science, 17(3), 249-255.

United Nations Population Fund, State of World Population Report 2023, confirming India's population surpassed China's in 2023. Retrieved 2026-09-10.