I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?
What is red and smells like blue paint?
Move four matchsticks to the below square to form three squares?
Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?
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?
In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected). But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?
What is the fastest way to double your money?
What is the centre of gravity?
I have a hole in my back and legs I lack. I live where I can’t breathe and I eat without teeth. What am I?
A word I know has six letters it contains, remove one letter and 12 remain. What is it?
How high do you have to count before you use the letter “a†in the English spelling of the whole number?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.