2, 3, 5, 9, 17, _ What is the next number in the sequence?
If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?
Which alphabet letter is a question?
Which alphabet is a part of our body?
Move four matchsticks to the below square to form three squares?
How can you tell a raw egg from a hard-boiled egg?
If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?
What does this mean? CCCCCCC
John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?
You knock a Table over in the library, and suddenly 20 eyes are looking at you.
What is so fragile that saying its name breaks it?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
