Find the missing number
Try to solve this mathematical puzzle. Find the missing number.Correct answers: 71
The first user who solved this task is Roxana zavari.
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Jacques de VaucansonDied 21 Nov 1782 at age 73 (born 24 Feb 1709). French inventor of automata - robot devices of later significance for modern industry. In 1737-38, he produced a transverse flute player, a pipe and tabor player, and a mechanical duck, which was especially noteworthy, not only imitating the motions of a live duck, but also the motions of drinking, eating, and "digesting." He made improvements in the mechanization of silk weaving, but his most important invention was ignored for several decades - that of automating the loom by means of perforated cards that guided hooks connected to the warp yarns. (Later reconstructed and improved by J.-M. Jacquard, it became one of the most important inventions of the Industrial Revolution.) He also invented many machine tools of permanent importance. |