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Find number abc

If 42a9b + a51a9 = 10cbac find number abc. Multiple solutions may exist.

Correct answers: 68

The first user who solved this task is Djordje Timotijevic.

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Christmas gift from girlfriend

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Railroad

In 1869, the first transcontinental railroad to run West out of Chicago was completed, running to Promontory, Utah. Amidst a crowd of dignitaries and workers, with the engines No. 119 and Jupiter practically touching noses, the Central Pacific and Union Pacific railroads were joined together. Telegraph operators transmitted to both coasts transmit the blows of the hammer as they fall on a golden spike. The nation listened as west and east came together in undivided union.«

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