Boy age 12 in the museum for mathematics Mathematicum in Giessen Germany

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