SapiX Grade 6 Math Weekly SapiX From basic to challenging entrance exam problems. By working through this problem set and getting used to the problems, you will definitely improve your skills! Frequently appearing problems included. Some writing in the first half, but I think it won't interfere with solving the problems. The answer sheets in the back are clean with no writing. This is a set of math problem books for elementary school students, Weekly SapiX. - Series Name: Weekly SapiX - Volumes: WS-01 to WS-14 - Contents: Math problem book - Format: Worksheet - Target Grade Level: Elementary school students Thank you for looking.