This is a straightforward vocabulary test, so if you've ever taken the SATs, this will feel totally familiar. Take the quiz here. It's highly unlikely you'll ever need to write something without spell ...

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.

Brainteasers and riddles are an exciting way to test your intelligence levels and mental sharpness - give these five quick challenges a go.