A 2021 edition problem collection featuring past problems from the Arithmetic Olympics. - Title: Arithmetic Olympics 2021 - Contents: Collection of past problems from 2011 to 2020 - Target audience: Elementary and junior high school students - Format: Problem collection - Publisher: Arithmetic Olympics Association Please consider purchasing only if you understand that this is a used item. I have checked and found no writing, but there is a possibility of oversight. Please ask any questions before purchasing. Thank you for looking.