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Find number abc

If a6b1b + 6cc91 = 146aca find number abc. Multiple solutions may exist.

Correct answers: 4

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Night vs Morning

Night vs Morning. At night: I can't sleep. In the morning: I can't wake up.

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Periodic table

In 1869, Dmitry Mendeleev published his first version of the periodic table of the elements. He was a Russian chemist who developed the periodic classification of the elements. In his final version of the periodic table (1871) he left gaps, foretelling that they would be filled by elements not then known and predicting the properties of three of those elements.

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