Visit Insider's homepage for more stories. Sometimes puzzles are so obvious that they're nearly impossible to solve.

Add Yahoo as a preferred source to see more of our stories on Google. Six eggs in a carton Riddles push us to think in totally new ways that we don't normally use. Even riddles that seem silly and ...

Riddles push us to think in totally new ways that we don't normally use. Even riddles that seem silly and simple at first can keep our brains flexible and ready to see things in innovative ways we ...