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Find number abc

If c2233 - 1433a = 3ba9c find number abc. Multiple solutions may exist.

Correct answers: 73

The first user who solved this task is Eugenio G. F. de Kereki.

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A few moments after the daught...

A few moments after the daughter announced her engagement, her Father asked, "Does this fellow have any money?"

"Oh Daddy, you men are all alike," sighing deeply, she replied, "That's exactly what he asked me about you."

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Mendeleeff observes eclipse

In 1887, Dmitri Ivanovich Mendeleev (1834-1907) used a balloon to ascend above the cloud cover to an altitude of 11,500 feet (3.5 km) to observe an eclipse in Russia. He made the solo ascent above Klin without any prior experience. While his family was rather concerned, he paid no attention to controlling the balloon until after he had completed his observations, at which time he worked out how to land it. Mendeleev is the Russian chemist known for the ordering of the Periodic Table of the Elements. Yet, he was interested in many fields of science. He studied problems associated with Russia's natural resources, such as coal, salt, metals, and the petroleum industry. In 1876, he visited the U.S. to observe the Pennsylvania oil fields.

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