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PUZZLES

100

 I am something you can write on, but I’m not paper. What am I?

Answer: Whiteboard (or chalkboard)

Explanation: You can write on it with markers or chalk, and what you write can be erased.

200

 I have keys but no locks. I have space but no room. You can enter but can’t go outside. What am I?

Answer: Keyboard

Explanation: A keyboard has keys, a space bar, and the Enter key—but none of these are literal doors or rooms.

300

I am a two-digit number. My tens digit is twice my ones digit. The sum of my digits is 6. What number am I?

Answer: 42

Step-by-step:

• Let the ones digit = x.
• Tens digit = 2x
• Sum: x + 2x = 3x = 6 → x = 2
• Tens = 2 × 2 = 4

400

I speak without a mouth and hear without ears. I have nobody, but I come alive with wind. What am I?

Answer: Echo

Explanation: An echo is a sound that repeats, but it has no physical form or body.

500

 There are three light switches outside a room, and only one controls the light inside. You can only enter the room once. How can you figure out which switch controls the light?

 Use the combination of light on/off and warm/cold to identify the correct switch.

Geography

100

Which place has no water, no trees, no life — but still covers about 10% of Earth? 

The Sahara Desert

200

The capital of Poland? 

Warsaw 

300

Which city is located on two continents?

Istanbul

400

Which country is both a city and a country at the same time?

Singapore 

500

Which country has 6 months of daylight and 6 months of darkness?

Norway 

Sport

100

Where were the first Olympic Games in history held?

Greece

200

What sport is played in every country, needs no ball, no court, and no team?

Running

300

In which sport is the term “dribbling” used?

Football 

400

What sport did the founder of famous company  Air Jordan play?

NBA (basketball)

500

What sport’s main objective is to “slam dunk”?

Basketball 

Human Body

100

What is the largest organ in the human body?

Skin

200

Which part of the human body continues to grow slowly with age?

Nose and ears 

300

I carry messages from your brain to the rest of your body. What am I?

Nerves

400

I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I?

Echo

500

When does a person’s heart stop beating for a few seconds?

Sneeze

Animals

100

Which type of animal is widely found in southern China?

Panda

200

Which animal can sleep standing up?

Horse

300

What is the only mammal that can truly fly?

Bat

400

What animal can run faster than a human but cannot jump?

Elephant 

500

Which animal has fingerprints almost identical to humans?

Koala