If you ever need to explain game theory to anyone, or you're in need of a quick primer yourself, here's a neat little tale that can help.

Remember the white and gold dress that wasn't white or gold? Or how about the Adidas jacket that was definitely green and gold until you looked at it for more than a few seconds? Welp, another clothes image has just begun to go viral and nobody can agree on what they are seeing. Judge for yourself.

How many times have you seen a post online or part of your social media feed that says something like “This Math Problem Is Stumping the Whole Internet. Can You Solve It?” or “Apparently 9 out of 10 people get this wrong. Do you know the answer?”

There's a reason why some people get different answers to these frustrating viral maths problems. You need to learn how to "read" the maths.

Cats who work for their food seem to be happier and healthier, so stuffing food into a toy isn't just a hobby for you. It's a way to reduce your cat's stress and keep them from getting bored. Need ideas? Food Puzzles for Cats is here for you.

Here's a list of the things I can do in 4.74 seconds.

Um... I've got nothing.

Believe it or not, there's an iPhone laying somewhere on this carpet. You don't need 20/10 vision or extraordinary detective skills to spot the handset -- all that's required is patience and a bit of squinting. (We've also included the solution for those who can't find it.)

Some viral posts on Facebook refuse to die -- especially when they challenge users' intelligence. For the past couple of years, this quiz has been periodically popping up on the social media service to test the mental muscles of more than three million users. Apparently, solving the puzzle proves you have a higher IQ than the average person. Have a plug and see how you go!