CHALLENGE YOUR BRAIN : 100 medium and advanced Sudoku puzzles with solutions by Taha Azzim English | 2020 | ASIN: B08GCYBD1K | 201 Pages | PDF/EPUB | 0.4 MB
Tony G Williams, "Algebraic Sudoku, Book 1: A Fun Way to Develop, Enhance, and Review Students' Algebraic Skills, Grades 6-8" English | ISBN: 1429122692 | 2011 | 52 pages | PDF | 1497 KB