IQ tests have been around for more than a century and were first designed in France to help identify students who needed extra support in school.

During World War I, the United States adopted modified versions of these tests to evaluate soldiers. Military leaders recognized that sending unqualified individuals into combat could be risky, so the tests were used to identify capable candidates. This practice continues today with tools like the Armed Forces Qualification Test.

IQ tests serve many purposes, as explained by Joel Schneider, a psychologist at Illinois State University. Some are designed for children at specific developmental stages, others for adults, and some are tailored to individuals with particular disabilities.

Now for a fun brain teaser! Can you spot the hidden items in the list: Bull, Smoking man, Rooster, Fox, Parrot, Deer, Elephant, Crocodile, Horse, Goose? Good luck!