There are many different ways to be "intelligent." What all types of intelligence have in common, though, is the ability to call up, compare, and manipulate multiple pieces of information very quickly, all at the same time.
These exercises challenge your brain to hold multiple pieces of information in mind, and make rapid decisions based on that information. Over time, your brain is pushed to retain, compare, and work with even more.
As you expand your brain’s capacity for this skill, you’ll be better equipped to make intelligent choices in your daily life.