There are many ways to exercise our brain, boost our IQ level, and enhance our thinking ability to observe or analyse objects after seeing. In today’s puzzle challenge, there is a challenging symbol, ...

These quizzes seek to test your IQ by asking you various challenging questions about all kinds of subjects. Take each quiz to find out if you're a genius (I bet you are). Time to test your vocabulary ...

Do you think you have sharp eyes? Try this optical illusion IQ test and spot the hidden needle without getting distracted by the tortoise-and-rabbit race. Only 25 seconds to check how strong your ...

There are several different ways to test observation skills withan IQ test. But, solving the brain teaser challenge ...

From twinkling constellations to stellar life cycles, this starry skywatching quiz will test your cosmic knowledge. When you purchase through links on our site, we may earn an affiliate commission.

Is our level of intelligence inborn or acquired during our lifetime? Is it possible to become smarter and increase our IQ score? This is one of the hottest scientific and politically sensitive ...