Find number abc
If c3b1b - bcc7b = b7a40 find number abc. Multiple solutions may exist.Correct answers: 27
The first user who solved this task is Djordje Timotijevic.
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Adding machineIn 1872, the first U.S. patent for an adding machine capable of printing totals and subtotals, called a "calculating machine," was issued to E.D. Barbour of Boston, Mass. However, it was not practical. (No. 133,188) |