Thank you for viewing. I have a copy that I kept at home. There are no markings. Please purchase if you understand that this is a used item. It will be sent by simple packaging via Rakuraku Mercari Mail or Yu-Yu Mercari Mail. This is a problem book for developing basic arithmetic skills, aimed at 6th graders. - Title: Basic Skills Completion Problem Book Arithmetic 6th Grade Volume 1 - Publisher: Yotsuya Otsuka - Series Name: Yosyu Series compliant Thank you for viewing.