[Machine Translation] The 15th volume of the popular! The 15th DVD in the "Koma Dai DVD" series! The world of mathematics challenged by Mas Kitano! The variety of difficult and unusual math problems continues! This time, about 20 problems selected by Koma University PTA from the contents broadcasted since January 2012 are included in the two discs! You can get absorbed in it, and do it with a smile! It's time for the Kitano Method of Math! --Kitano of the world actually wanted to be a mathematician. If he liked it so much, he created this program. Every time, you will study college-level problems in a fun and easy-to-understand way. Solve them using your spark, intellect, and physical strength. Everyone will love math!