How can a man go eight days without sleep?
Can you name some countries which do not have the alphabet 'A' in them?
A letter is hidden in the image in plain sight. Can you spot it in 6 seconds? Test your eye power now!
How many triangles can you count in the figure given?
You have two buckets of 11 liters and 6 litres. How can you measure exactly 8 litres?
What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?
What can you serve, but never eat?
John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass. What did the boy do?
A shepherd had 18 sheep, out of which, all but ten died. Can you tell us how many sheep was he left with?
John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?" While Bella does not know the answer, do you ?
It's a test that will check your IQ. Suppose you have one 11 minute hourglass and one 13 minute hourglass. Can you measure exactly fifteen minutes using them ?
The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.