Over 80 Number Puzzles Paperback / softback Main Details Title Over 80 Number Puzzles Authors and Contributors      By (author) Various Illustrated by Various Physical Properties Format:Paperback / softback Pages:112 Dimensions(mm): Height 198,Width 130 ISBN/Barcode 9781409584544 Classifications Dewey:793.74 Audience Children / Juvenile Publishing Details Publisher Usborne Publishing Ltd Imprint Usborne Publishing Ltd Publication Date 1 September 2014 Publication Country United Kingdom Description Exercises number skills in a number of ways