What is in seasons, seconds, centuries and minutes but not in decades, years or days?
Which is the smallest number that you can write using all the vowels exactly once?
Can you find the thief by just looking at the picture below?
What three numbers, none of which is zero, give the same result whether they’re added or multiplied?
There is something which is always coming but never arrives?
A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
Below, you can see some coding: January = 1017 February = 628 March = 1335 April = 145 May = 1353 June = 1064 July = 1074 August = 186 Now deciphering the way it has been coded, can you find out how September will be coded?
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?
When is the top of a mountain similar to a savings account?
There were three women in all the swimming costumes! One was happy and the other two were sad! The happy one was crying and the sad ones were smiling. Why was this?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
