Count the number of balls in picture below:
Can you count the number of triangles in the picture below?
Can you move two match sticks to make it 430?
Count the number of triangles in the given picture.
Find the hidden tiger in the given optical illusion ?
Can you Find and name the hidden bird in the picture below ?
Can you find out the number that should replace the question mark with a valid reason?
In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?
Can you find out the missing number in the grid?
Solve this riddle by finding the odd one out from the rest.
Here is a mathematical expression that also secretly tells a movie name. What movie is that?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.