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E Eiken quiz Learn English vocabulary and grammar › K Kanken quiz Practice reading and writing kanji › M Suken quiz Arithmetic and math, grades 10 to 1 › S Science proficiency quiz Grades 5 to 1: physics, chemistry, biology, and earth science › WH World Heritage quiz Grades 4 to master level › L Logical reasoning Sequences, sets, reasoning, and probability ›

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CT Crane-and-turtle problems Try a rank test › WR Work-rate problems Solve work-rate problems › TX Tax calculations From consumption tax to bookkeeping ›

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