Math logic
English tricks
Classic riddles
Creative logic
Tricky learning
100

This number is the only even prime number.


2 

100

This English word becomes shorter when you add two letters to it.


Short

100

What has keys but can’t open locks?


A piano

100

You can catch it, but you cannot throw it.


A cold

100

A plane crashes on the border between the USA and Canada. The survivors are buried in this place.


nowhere — survivors aren’t buried?


200

A farmer has 17 sheep, and all but 9 die.


What is 9 

200

This comes once in a minute, twice in a moment, but never in a thousand years.


The letter “M” 

200

What has hands but can’t clap?


A clock

200

If you drop me, I’m sure to crack, but give me a smile and I’ll smile back.


A mirror

200

This month has 28 days.


All months 

300

If it takes 5 machines 5 minutes to make 5 items, this is how long it takes 100 machines to make 100 items.


5 minutes 

300

The more you share it, the less you have.


A secret 

300

What goes up but never comes down?


Your age 

300

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


An echo 

300

The more you feed it, the bigger it gets, but if you give it water, it dies.


Fire 

400

A bat and a ball cost $1.10 in total. The bat costs $1 more than the ball.

This is the cost of the ball.


0,05

400

This question can never be answered with a “yes.”


 “Are you asleep?”


400

What travels around the world while staying in one corner?


A stamp 

400

The more you take from it, the bigger it becomes.


A hole 

400

This building has the most stories in the world.


A library 

500

A woman has twice as many brothers as sisters.

Each brother has the same number of brothers and sisters.

This is how many children are in the family.


7 children (4 girls and 3 boys)?


500

This word becomes a different word when you change only one letter, and both words are opposites.


Light-night 

500

What can fill a room but takes up no space?


A light 

500

I shave every day, but my beard stays the same.


A barber 

500

Before Mount Everest was discovered, this was the highest mountain in the world.

Mount Everest (it still existed)?