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There are four three-digit n...

There are four three-digit numbers that share this property: the number itself, its double and its triple contain each digit from 1 to 9 exactly once. For example, 192 is one of them because 192, 384, 576 contain 1 to 9 each once. 273 is another one of them because 273, 546, 819 contain 1 to 9 each once. Can you find the other two numbers and calculate the product of these two numbers?

Correct answers: 23

The first user who solved this task is Djordje Timotijevic.

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John Hill

Died 21 Nov 1775 (born c. 1716).English writer and botanist who compiled the first book on British flora to be based on the Linnaean nomenclature. While an apothecary by trade, he studied botany in his spare time. Employed by the Duke of Richmond and Lord Petre to arrange their collections of plants, he travelled extensively to collect rare plants for them. He also wrote plays, novels, and papers on natural history, medicine, astronomy, and geology. He edited the monthly British Magazine (1746-50) and contributed a daily society-gossip column to The London Advertiser and the Literary Gazette. In 1759, the first of the 26 folio volumes (1759-75) of his Vegetable System was published, containing 1,600 copper plate engravings, represented 26,000 different plants.

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