It comprises roots which nobody sees, Much taller than those trees, Up and up it goes, Still it never grows?
When I get multiplied by any number, the sum of the figures in the product is always me. What am I?
It can be easily calculated that the digits 0 to 9 can be arranged into 3628800 distinct ten-digit numbers. But do you know how many of these numbers are prime?
Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?
If six children and two dogs were under an umbrella, how come none of them got wet?
What have one eye but still cannot see?
Riddle me this, Riddle me that, What am I? I am made of wood, but you can't see me down?
If, A = 1 B = 2 C = 3 ... ... Z = 26. Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.
What jumps when it walks and sits when it stands?
What you cannot hold but it is yours?
I have a head like a cat and feet like a cat, but I am not a cat. What am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
