Mind Puzzles For Kids: Eulero Puzzles - 100 Large Print Puzzles

("Graeco-Latin Square", "Euler Square") is a puzzle with letters and digits. The goal is to fill in the grid with symbols according to the following rules:- Each cell contains one letter and one digit. - Every row and every column contains each letter and each digit exactly once. - No two cells contain the same pair of symbols. brain teasers for kids ages 10-12 - brain teasers for kids - brain teaser games - brain teaser games for kids - brain teaser activity book - brain teaser for kids - brain teaser for kids ages 8-10 - brain teaser gifts - brain teaser games for kids ages 10-12 - brain teaser riddles