Around the world
Riddles & Brain Teasers
Science & Curiosity
Quick Facts & Fast Thinking
100

What is the capital city of France?

Paris

100

What has keys but can’t open locks?

A piano (or keyboard)

100

What is H2O?

Water

100

How many seconds are in one minute?

60

200

Which country is famous for the cities Kyoto and Osaka?

Japan

200

I speak without a mouth and hear without ears. I come alive with wind. What am I?

An echo

200

Which planet is called the Red Planet?

Mars

200

What is the only mammal capable of true flight?

Bat


300

Which African country was formerly known as Abyssinia?

Ethiopia

300

I am not alive, but I grow; I don’t have lungs, but I need air. What am I?

Fire

300

What part of the eye controls the amount of light entering?

The pupil (controlled by the iris)

300

What is the hardest natural substance on Earth?

Diamond

400

What is the smallest country in the world by land area?

Vatican City

400

The more you take, the more you leave behind. What am I?

Footsteps

400

What aerodynamic principle explains how airplanes generate lift?

Bernoulli’s Principle

400

Which country invented paper?

China

500

What is the “Forbidden City,” and where is it located?

An imperial palace complex in Beijing, China

500

A house is built with all sides facing south. A bear walks by. What color is the bear?

White — it must be at the North Pole (polar bear)

500

In physics, what is the term for disorder or randomness in a system?

Entropy

500

If you multiply this number by any other number, the answer is always the same. What number is it?

Zero

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