An easy-looking equation has proved difficult to solve for many online. Can you remember a golden rule from math lessons to help you get the right answer?

It looks simple at first, but this math problem has the internet stumped. Don't be fooled - it demands more brainpower than ...

IQ tests present readers with picture puzzles or math problems, and they need to find the solution within a time limit. These simple puzzle games sharpen the brain. By providing an effective workout ...