Modern IQ tests are now based on the normal distribution of scoring. Due to this fact the term “intelligence quotient” is, in reality, defunct but still widely accepted.

This classic brain teaser, created by American printmakers Currier and Ives in 1872, features 16 figures cleverly hidden within an image. Can you find them all?

This optical illusion IQ test challenges you to find the hidden ‘257’ cleverly disguised among a grid of 2S7s — and you have just 9 seconds! Put your observation skills to the ultimate test and see ...

Think your IQ is 125 or higher? It’s time to prove it with this challenging optical illusion! Somewhere in this vibrant, ...

Test your 140+ IQ level with this fun brain teaser! Find the odd number hidden in the '256' sequence series within 11 seconds to boost your observation and thinking skills.

From the start, Mega was riven by infighting. In the 1990s, it merged with another society and announced that members would ...

Decades ago, the Court said inmates who are intellectually disabled can't be executed. Now, it will weigh the use of intelligence tests in death penalty cases.

Brain teasers are like mini mental playgrounds. They twist our thinking, challenge our assumptions, and leave us with a satisfying "Aha!" moment when we finally crack the code. But beyond the initial ...

1. Here Are 30 Words — Only People With An IQ Range Of 120–145 Will Know Their Definitions Remember those Vocabulary Workshop ...

Today’s challenging puzzle is to find the letter “C” among the “O” sequence series. So, if you think you're a genius with an ...