Here is a book which could change your life. Marilyn Vos Savant and Leonore Fleischer demonstrate how the power and capacity of your brain and intelligence can be exercised and strengthened like any muscle in the body. If you take the time to exercise and build your brain power you will be able to increase your abilities and realise your full potential.
BRAIN POWER contains a 12-week mental training programme consisting of practical exercises to stretch your mind and build the power and capacity of your brain and intelligence. Learn how to view the world more clearly, accept challenges, make decisions, attack problems, explore the unknown, remember things more accurately and open your mind to new ideas and live life to the full. The result will be an improvement in quality of life, career success and personal achievement.

You don't have to know mathematics to have a mathematical mind, and you don't need a degree to improve your brain power. You just need determination and this book.