As easy as you can get into me, it is as hard to get out of me. Do you know what I am?
Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?
How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?
When 99 is considered higher than 100?
There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only. Can you find that number?
A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result. Can you find how bias is the floor in this case?
Can you fill the blank with the correct number? 6 30 870 756030 _____
I never was there, I am always to be. You have never ever seen me, not ever you will. Yet I am the confidence of everyone. Who Am I?
The following question it puts forth you: 25 - 55 + (85 + 65) = ? Then, you are told that even though you might think it's wrong, the correct answer is actually 5! Whats your reaction to it? How can this be true?
In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?
If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.