Count the number of squares in the picture below.
John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?
How can you leave a room with two legs and return with six legs?
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 ?
There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?
I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?
In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?
If your uncle’s sister is not your aunt, what relation is she to you?
An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?
Find the hidden panda in the image below.
Why is the Hole below a Lock?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.