Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?
You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth. How long would it take for the machine to cut the roll if each cut took 4 secs?
What has hands, but can’t clap?
Can you guess the name of the month by looking the below rebus ?
John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not. Is a married person looking at an unmarried person ?
A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.†Who was in the photograph?
In the given figure, move three matchsticks so that the resulting figure contains two rectangles.
There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?
I cry without having a voice. I fly without having wings. I bite without having teeth. I whisper without a mouth. Who am I?
What can jump higher than a building?
Solve the mathematical equation in the picture below.
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.