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Find number abc

If 30843 - a0a4c = 20c9b find number abc. Multiple solutions may exist.

Correct answers: 18

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

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Don't take life too seriously

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First public aquarium

In 1853, the Aquatic Vivarium, the world's first public aquarium, was opened in Regent's Park, London, the inspiration of an English self-taught naturalist, Philip Henry Gosse, who wrote popular illustrated books on nature, and especially marine biology. He invented the institutional aquarium when he opened the Aquatic Vivarium.*

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