Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?
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?
Which of the following words don't belong in the group and why? CORSET, COSTER, SECTOR, ESCORT, COURTS
In the four images below, can you find the odd one out?
You can hear me, but you can't touch or see me. What am I?
What is black when you buy it, red when you use it, and gray when you throw it away?
What do you answer even though it never asks you questions?
I look at you, you look at me I raise my right, you raise your left. What am I?
Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?
John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not. Is a married person looking at an unmarried person ?
I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house. Who am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.