So is the perfect number of friends one ride-or-die bestie who goes to bat for you when you lie at your high school reunion about inventing Post-It Notes? Or maybe it’s three larger-than-life ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Is there such a thing as having the perfect ...

This week's GeekDad Puzzle of the Week is about perfect and almost perfect number pairs. Perfect numbers are numbers that equal the sum of their divisors. For example, the number 6 can be divided ...