A set of problem collections and answer explanations for the 2019 edition of the certification exam. Everyone wanted it! 10 years of past questions for Denken 3rd Class - Title: Denken 3rd Class Problem Edition - Title: Mechanical Answer Explanation Edition From 2009 to 2018 Questions are for 10 years, covering Theory, Power, Machinery, and Regulations, but answers are only for Machinery. Please note. I think old past questions are valuable because they are not available on the internet. How about it for those studying for Denken 3rd Class? I have other items for sale as well. Discounts are available for bulk purchases. Although there is overall aging, the inside is clean, so I have selected "Like new". Due to the thickness, it will be simply packaged.