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Find number abc

If b2b71 - 12b5a = a001c find number abc. Multiple solutions may exist.

Correct answers: 32

The first user who solved this task is Nasrin 24 T.

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Edison patent

In 1901, Thomas A. Edison was issued patents for a "Magnetic Separator" and an "Apparatus for Screening Pulverized Material" (U.S. Nos. 675,056 and -7), two of several patents for which he applied in mid-1897 concerned with "a Method of breaking rock", rolls, a conveyor, drying apparatus, mixer, and "Lubricating Journal-Bearings." The patent diagram (left) shows a magnet at the centre separating falling streams of magnetic and non-magnetic materials.

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