Abstract
C. Dudley Langford noticed that his son had arranged colored blocks as shown in Fig. 9.1. There is one block between the red blocks, two blocks between the blue blocks and three blocks between the green blocks.
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Ben-Ari, M. (2022). Langford’s Problem. In: Mathematical Surprises. Springer, Cham. https://doi.org/10.1007/978-3-031-13566-8_9
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DOI: https://doi.org/10.1007/978-3-031-13566-8_9
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