Main article categories:
Only 1 in 5 people manage to solve this riddle quickly: can you find out the name of the father's fourth son?
Only people with the highest IQ can find all the T letters in less than 10 seconds
Very few people can solve this math exercise without using a calculator - can you?
Only a few manage to find the face that hides within this fascinating image
Even adults fail to find the answer to this children's math puzzle
Only 7% can see the animal hiding in the picture - can you?
Only 1 out of 7 answer it right: how many holes are in this shirt?
Only 1 out of 10 people can find the dog hiding in the picture - are you one of them?