Ready to challenge your brain and your eyes at the same time? This optical illusion and IQ-style test is designed to check ...

Optical Illusion: We are back with another one of our ‘spot the odd’ puzzles! We know you love them. Not only are they interesting, but they also help participants in testing their vision and ...

An optical illusion challenge is captivating social media, testing observation skills with a grid of numbers. The task involves spotting a single "116" hidden among numerous "119s" within a 10-second ...

Board game nights can get awkward fast when the group headcount doesn’t line up. Most games shine with even numbers, but what do you do when there’s five of you? Or worse, seven? I’ve been in that ...

Seek and Find puzzles are one of the popular online activities that test readers with an intriguing image in which they need to find a hidden object, which can be anything (number, alphabet, an animal ...

If you feel a little odd today, your calendar might explain why. Today’s date, 9/11/13, is a mathematical phenomenon so rare that it only occurs five times every 100 years. This is the last time for ...

Opinions expressed by Entrepreneur contributors are their own. Ever wonder why some products are listed for $199 or $299 instead of just $200 or $300? Does the extra dollar really make a difference?

Ever wonder why you prefer to have an even number on the volume dial rather than leaving the TV's sound on, say, 73? While many write this quirk off as a minor OCD habit, our emotional ties to numbers ...

Humans are so smart that we can easily learn the difference between even numbers and odd numbers. And until a new study emerged, humans believed we were the only species capable of this feat, known as ...