As a whole I am both safe and secure. Behead me and I become a place of meeting. Behead me again and I am the partner of ready. Restore me, and I become the domain of beasts. What am I?
Look at the picture and find out which square is not linked with any of the other squares.
John was piloting a plane behind a car but was never able to overtake it. Why?
You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?
Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()
In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?
In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?
What does this rebus mean? O N C E TIME
How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?
Can you find the missing number in the third row? 35 20 14 27 12 18 5 2 ?
Why Aeroplane windows are round?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.