What is next number in the pattern below: 131 517 192 123 ?
Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?
How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?
The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?
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?
There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number. What is the smallest number that stands true on the statement?
A plane crashed between the border of Mexico and America. Where do you bury the survivors?
If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?
Can you find the thief by just looking at the picture below?
Can you find the 09 errors in the picture below?
What is the next number in the series? 15 29 56 108 208 ?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
