A bomb goes off. Carnage. One person, only a few feet away, survives! How can this be?
Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?
Why is a river so rich ?
Find three whole, positive numbers that have the same answer when multiplied together as when added together.
I am white when I am dirty, and black when I am clean. What am I?
John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?
This is a classy optical illusion puzzle. What more you can find except bricks in the image below?
The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total. How much time will he take to have all the five tablets?
When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?
Can you find the missing number in the third row? 35 20 14 27 12 18 5 2 ?
What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
