Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?
How can you drop a raw egg from a height onto a concrete floor without cracking it?
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 identify if it's a murder or a suicide ?
Can you find a number that lies one third of the distance between 1/3 and 2/3?
Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?
A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?
Begin with a word, five letters to my name, Remove the first and last but I am the same Take out my middle and still, I remain. What word am I?
How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?
What is the fastest way to double your money?
I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.