It comprises roots which nobody sees, Much taller than those trees, Up and up it goes, Still it never grows?
What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?
I know a nine-letter word having only one vowel. Do you ?
A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?
While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side. How many houses are there between your home and your grandmother's home?
What has many keys but can’t open a single lock?
What have one eye but still cannot see?
Manish has to secure 40% marks to pass his B.tech final exams. He got just 40 marks and failed by 40-marks. What is the maximum marks?
During which month do people sleep the least?
How many letters are in the alphabet?
I am the fastest animal but cannot climb the tree. What am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.