These EXTRA LARGE Logic Grid Puzzles are designed to challenge the mind and stretch your powers of reasoning beyond the standard 4x5 Logic Problem. The book includes 20 puzzles in 4x7 format and 20 puzzles in 5x5 format. From the clues provided, match the choices in each category and solve the problem. 40 puzzles to complete. Read the scenario description, decipher the clues and complete the logic grid. Each puzzle has just one solution. These brain teasers can be completed over a quick cup of coffee, or to relax and unwind after a long day. The book comes with instructions to help you get started if you are new to logic problems.