What is both possible and impossible at the same time?
What is the difference between a jeweller and a jailer?
You can hear me, but you can't touch or see me. What am I?
How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?
Considering the below equation: V + II - VI = 10 IV - X + VIII = 20 IV - VII + VI = 30 Then, I + II + III = ?
Count the number of balls in picture below:
Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?
Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?
Who always enjoys poor health?
What does it mean?
Take one out and scratch my head, I am now black but once was red. What am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.