This book is the best fun way to refresh your maths skills.This book amazingly a playful attitude to understand some very involved math concepts.The book is very well written and organized. Also the problems in this books range from easy to very difficult and most of the are very interesting.
This book has made learning maths easy and is of much greater help than any of my coursebooks have ever been.The topics range fromlogic, basic number theory to graph theory and games.So if you struggle in understanding basic mathematical concepts this is the book you wanna have for the rest of your life!