Math
Science
Geography
Football (Soccer)
Riddles
100

I am a number with two digits. If you reverse my digits, I become 27 more than I was. What number am I?

36


(63-36 = 27)

100

I am essential for respiration in living beings. Without me, we wouldn't be able to breathe. What am I?

Oxygen

100

I am a continent that is home to the Sahara Desert and the Nile River. What continent am I?

Africa

100

How many players are on the field at the same time? (for Major Professional Leagues)

22 (11 from each team)

100

What has keys but can't open locks?

Piano

200

I am a three-digit number. My tens digit is five more than my ones digit, and my hundreds digit is eight less than my tens digit. What number am I?

194


(tenth = 4 + 5 -->9, hundreds = 9 - 8 --> 1)

200

I can be liquid, solid, or gas, and I am needed for most chemical reactions. What am I?

Water

200

I am a country where the Great Wall is located. What country am I?

China

200

Which country won the FIFA World Cup in 2018?

France

200

I am something you can catch but not throw. What am I?

A cold
300

I add five to nine and get two. The answer is correct, but how?

It’s 2 o'clock in the afternoon

300

I am a simple, colorless gas that plants need for photosynthesis. What am I?

Carbon dioxide

300

I am an island country known for kangaroos and koalas. What country am I?

Australia

300

Why are soccer fields so unsure about making decisions?

Because they have two opposing goals

300

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

Footsteps


400

I am a number that is the same when read forwards and backwards. What number am I? (multiple answer possible)

any palindromic number (121, 131, etc.)

400

I am known for my role in making up the universe, and my name sounds like a type of particle. What am I?

Atom

400

I am a city in North America that is famous for its Golden Gate Bridge. What city am I?

San Francisco

400

Which club has won the most UEFA Champions League titles?

Real Madrid


400

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

Fire

500

What is the integral of 4x^3-2x+1?

x^4−x^2+x+C

500

What is the atomic number of gold?

79

500

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

Vatican City


500

Who was the first player to win three FIFA World Cup titles?

Pelé

500

What is seen in the middle of March and April that can’t be seen at the beginning or end of either month?

The letter “R”