What word begins and ends with an E, but has only one letter?
The more of this there is, the less you see. What is it?
Can you solve this picture maths equation?
I make two people out of one. What am I?
Which point will the car reach to go out?
There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?
What has to be broken before you can use it?
He does not have any heart but still, He manages to live. If you kill him, you will eventually die but yet you kill him. He cannot run, who is He?
What have one eye but still cannot see?
During which month do people sleep the least?
Pronounced as one letter, And written with three, Two letters there are, And two only in me. I am double, I am single, I am black blue and grey, I am read from both ends, And the same either way.
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.