Keep your brain active with daily puzzle solving - doctor's advice This mind challenging book contains three hundred sixty six hard puzzles designed to improve your intelligence quotient (IQ). You cannot change your IQ; it is a measure of the intelligence you already have. However, the IQ you use on a daily basis - your effective IQ - can be increased. Doing so can help you be more successful in your personal relationships, as it increases your ability...
Related Subjects
Games