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Strengthen logic skills and prepare for standardized tests that reward logical thinking with Grid Perplexors! Stories challenge readers to determine who, what, where and when details using the given clues; as they use the process of elimination, students will son be on their way to improved scores and increased critical thinking skills. 50 puzzles, 56 pages, softcover. Answers included. Level D is for grades 7 & up; puzzles increase in difficulty. Classroom reproducible pages up to 100 copies.