First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?
Why are all black people so quick ?
What has no start, end, or centre?
What does Alexander the Great and Winnie the Pooh have in common?
How is a fly different from a mosquito?
If it took eight men ten hours to build a wall, how long would it take four men to build it?
When it's bad luck to meet a black cat?
Which is the rope you never skip with?
What has many teeth, but cannot bite?
An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky. Which layer will go on the first?
A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.