If I may ask sir, is there any possibility of beginning this course with my andriod device, if there is can you recommend an app where I can begin this journey just as you have, I am certain that if I don't start now the rest of the course will be more ambiguous. In Overall I enjoy reading you entry but it is obvious that I won't understand until I practice it's a complicated course without a system, I think this course need more a mathematical knowledge, I am sure I have that and can speak a little of factorials if not perfectly, glad to see you have dropped your entry. Goodluck on the contest