Brain Teasers
What comes once in a minute, twice in a moment, but never in a thousand years?
The letter "M"
What gas do plants absorb from the air?
Carbon dioxide
What is the capital of France?
Paris
Calculate the area of a circle with radius 7.
49π.
Who was the first President of the USA?
George Washington
The more you take, the more you leave behind. What am I?
Footsteps
What is the hardest natural substance on Earth?
Diamond
What is the longest river in the world?
The Nile
There are 5 apples in a basket. How can you share them among 4 people so that one apple remains in the basket?
Give one apple to each of the four people, and give the last apple along with the basket to the final person.
Who painted the Mona Lisa?
Leonardo da Vinci
I speak without a mouth and hear without ears. What am I?
An echo
What is the boiling point of water in Celsius?
100°C
How many continents are there?
7
Determine the next term in this sequence: 1, 4, 9, 16, …
25
What year did World War II end?
1945
The more you remove from me, the bigger I get. What am I?
A hole
Which planet is known as the Red Planet?
Mars
Which country has the most people?
China
What is the next prime number after 7?
11
Who invented the light bulb?
Thomas Edison
I have cities, but no houses; I have mountains, but no trees; I have water, but no fish. What am I?
A map
What is the largest organ in the human body?
Skin
What is the only continent where kangaroos live naturally?
Australia
Determine whether 121 is a prime number
NO: 121=11*11
What is the name of the ship that hit an iceberg and sank in 1912?
Titanic