Categorize each of the sixteen pictures into one of four groups. Each group will consist of exactly four pictures with something in common. Each picture will be in exactly one group.

Many people find 'Grouping' puzzles quite difficult. You must first identify the pictures and then start looking for common factors. The common attributes can relate to the objects themselves, but they can also relate to the words that represent the objects. Use your best pattern recognition skills. If you come up with a reasonable answer that differs from our answer, you have succeeded. The mental exercise is far more important than matching our answer.