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A research laboratory of a world-leading automobile company has received an order to create a special transmission mechanism, which allows for incredi 阅读全文
posted @ 2021-01-30 20:03
布拉多1024
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Andy, 8, has a dream - he wants to produce his very own dictionary. This is not an easy task for him, as the number of words that he knows is, well, n 阅读全文
posted @ 2021-01-30 19:58
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Ugly numbers are numbers whose only prime factors are 2, 3 or 5. The sequence 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, ... shows the first 11 ugly numbers. 阅读全文
posted @ 2021-01-30 19:50
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