Two, four, six, eight,
See what puzzles illustrate.
You can slow your aging rate,
Be the master of your fate.

These puzzles are designed to help your brain:

1. Recognize differing details
2. Perceive the big picture and register what doesn't match

While they may be done more easily by brains that possess a Visual Sensory Preference, all the more reason for Auditories and Kinesthetics to practice. As an Auditory, I realize that just creating these has helped my visual abilities improve significantly.

As with other types of Brain Aerobic Exercises, periodically review puzzles you've already done and try to identify the differences even more quickly.