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Piled up wooden stairs and their distances covered. A discovery of the harmonic series guided by experiments. (Gestapelte Holztreppen und ihre Wegstrecken. Eine experimentengeleitete Entdeckung der harmonischen Reihe.) (German)
PM Prax. Math. Sch. 57, No. 65, 23-26 (2015).
Classification: I33 D43 D83 M53 I23
1
Dealing with patterns and discovering “Fibonacci". (Mit Mustern umgehen und “Fibonacci" entdecken.) (German)
PM Prax. Math. Sch. 57, No. 61, 44-47 (2015).
Classification: I33 H23 D83
2
Triangles of equal area. (Flächengleiche Dreiecke.) (German)
PM Prax. Math. Sch. 56, No. 60, 40-45 (2014).
Classification: G33 G43
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