Brain Teasers
Inventions & Discoveries
Words & Linguistics
Philosophy & Thinkers
Global Curiosities
100

What has cities, but no houses; forests, but no trees; and water, but no fish?

What is a map?

100

This ancient device, invented in Mesopotamia around 3500 BCE, is often called the single most important invention.

What is the wheel?

100

This language family includes French, Spanish, and Italian.

What is Romance?

100

This philosopher’s “golden mean” taught virtue lies between extremes.

Who is Aristotle?

100

This country is home to Machu Picchu.

What is Peru?

200

I’m taken from a mine, locked up in a wooden case, and used by almost everyone. What am I?

What is pencil lead?
200

This inventor’s contributions to alternating current (AC) electricity rivaled Thomas Edison’s direct current (DC).

Who is Nikola Tesla?

200

The dot above a lowercase “i” or “j” has this specific name.

What is a tittle?

200

This Chinese thinker emphasized filial piety and proper social relationships.

Who is Confucius?

200

This landlocked country has the highest elevation capital city in the world: La Paz.

What is Bolivia?

300

The person who makes me sells me. The person who buys me never uses me. The person who uses me never knows it. What am I?

What is a coffin?

300

This scientist, while studying pea plants, laid the foundation for modern genetics. 

Who is Gregor Mendel?

300

The word “alphabet” itself comes from the first two letters of this ancient writing system?

What is the Greek alphabet (alpha + beta)?

300

øren Kierkegaard is considered the father of this branch of philosophy.

What is existentialism?

300

This city’s name means “the end of the world” in Arabic, and it’s one of the hottest inhabited places on Earth.

What is Timbuktu?

400

What English word retains its pronunciation even after you remove four of its five letters?

What is queue?

400

The Haber-Bosch process, developed in the early 20th century, made this critical chemical compound available on a mass scale.

What is ammonia (NH₃)?

400

This extinct language was deciphered thanks to the Rosetta Stone.

What is Egyptian hieroglyphics?

400

This philosopher’s “categorical imperative” stressed duty-based ethics.

Who is Immanuel Kant?

400

This sea, shrinking rapidly due to irrigation, was once the fourth-largest lake in the world.

What is the Aral Sea?

500

If you have it, you don’t share it. If you share it, you don’t have it.

What is a secret?

500

This 17th-century Dutch scientist improved the microscope and is often called “the father of microbiology.”

Who is Antonie van Leeuwenhoek?

500

This is the only word in English that ends with the letters “mt.”

What is dreamt?

500

Michel Foucault studied the relationship between power and knowledge in institutions like prisons, hospitals, and schools. His work belongs to this century.

What is the 20th century?

500

The Silk Road historically connected China with this sea, linking Asia to Europe.

What is the Mediterranean Sea?