This is a problem set and explanation book on numerical reasoning from O-Hara's qualifications program. It has been used very little and has no writing in it. This book allows you to thoroughly prepare for numerical reasoning, which is essential for the civil service exam! With its easy-to-understand explanations, it's a recommended reference book even for those who are not good at numerical reasoning♪ There are a few scratches on the cover. Please refrain from purchasing if you are concerned. #CivilServant #OharasQualifications #ReferenceBook