A viral number sequence puzzle challenges players to find the next number in “2, 6, 12, 20, 30, ?”. Test your analytical ...

This brain teaser challenges you to find the missing number in a sequence following a doubling pattern. Starting with 4, the sequence grows with differences that double each time. The answer is 97, ...

An optical illusion challenges viewers to find a subtle anomaly within a repeating pattern of the letters HJKL. The brain's tendency to overlook details in consistent patterns makes spotting the rogue ...

A tricky brainteaser is likely to put even the sharpest of eyes to the test. Online bingo experts at tombola have crafted a tough brainteaser that only one in four can solve. The aim of the ...

We employ a polychotomous version of Mokken Scaling Analysis to create an improved measure of government respect for a subset of human rights known as physical integrity rights. The scale we produce ...

Proceedings of the National Academy of Sciences of the United States of America, Vol. 87, No. 2 (1990), pp. 826-830 (5 pages) We have developed a method for rapidly finding patterns of conserved amino ...