Get off the Earth
Objetos & Vídeos
Um dos famosos quebra-cabeças de Sam Loyd chama-se Get off the Earth e foi produzido muitos anos após o 14-15 Puzzle. O seguinte é uma descrição de Loyd deste quebra-cabeças, retirado da revista Strand, de janeiro de 1908:
“It consisted of two concentric pieces of cardboard, fastened together so that the smaller inner one, which was circular, moved slightly backwards and forward, on a pivot, producing the mystery. As you looked at them, there were thirteen Chinamen plainly pictured. Move the inner card around a little and only twelve Chinamen remained. You couldn't tell what had become of the other Chinaman, try as you would. Scientists tried it without success, and indeed no single absolutely correct analysis was ever submitted.”
Deixamos o vídeo do canal Numberphile onde Ben Sparks tenta explicar o desaparecimento de um dos rapazes deste quebra-cabeças.
Fonte: https://mathshistory.st-andrews.ac.uk/Biographies/Loyd/
Por Adília Marinho