Luis Garavito killed Density x Volume. Who is Luis Garavito ?
What is common among 11, 69, and 88?
If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age. How old will John be two years from now?
It's a test that will check your IQ. Suppose you have one 11 minute hourglass and one 13 minute hourglass. Can you measure exactly fifteen minutes using them ?
There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across. How?
Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?
What is the coolest letter in the alphabet?
What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?
Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?
If nine thousand, nine hundred nine dollars is written as $9,909, how should twelve thousand, twelve hundred twelve dollars be written?
I don't get anymore wetter, no matter how much rain falls on me.
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
