An optical illusion challenges viewers to find a subtle anomaly within a repeating pattern of the letters HJKL. The brain's ...

A viral number sequence puzzle challenges players to find the next number in “2, 6, 12, 20, 30, ?”. Test your analytical skills and see if you can solve it.

Prime numbers are the ones that have only two factors: 1 and itself. Credit: Ssindhwani / Wikimedia Commons Prime numbers are those divisible only by themselves and by one. Despite their apparent ...

Today’s challenging puzzle is to find the odd letter “P” among the “R” sequence series. So, if you think you're a genius with an 143+ IQ level, then find the odd letter “P” in the sequence of the “R” ...

Beat the clock by spotting the pattern in this brainteaser challenge. You'll see a row of different shapes but one shape is missing, replaced by a question mark. It's up to you to figure out what 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 ...