Download or read book 50 Doors Crack The Code written by Boost Memory Brain Puzzle Prints and published by . This book was released on 2020-05-08 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are you looking for a fun way to improve your brain and boost your memory? This 50 Doors Crack The Code puts your ingenuity and perseverance to the test in this puzzle book you will find 50 doors to open so let's be smart More than 300 codes combination 4 Difficulty levels with solutions Easy level 2 digit key to crack Medium level 3 digit key to crack Hard level 4 digit key to crack Extrerm level 5 digit key to crack Countdown to test your QI