Girl age 9 10 in the museum for mathematics Mathematicum in Giessen Germany

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Photo credit: © UKraft / Alamy / Afripics
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Keywords: answer, child, children, discovery, education, exercise, experiment, girl, instruction, knowledge, learn, mark, mathematicum, museum, play, pouring, preparatory, proportion, pupil, puzzles, question, research, school, study, studying, teacher, training