Why are all black people so quick ?
The centre of the third figure is empty. What digit should fit inside?
If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?
If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?
Can you quickly find which two matchstick figures are identical?
My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?
Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?
Why Wine Glass Stem is so long?
What has a bottom at the top?
What jumps when it walks and sits when it stands?
You see me once in June, twice in November, and not at all in May. What am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
