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DescriptionBessie noted that although humans have many universities they can attend, cows have none. To remedy this problem, she and her fellow cows f... 阅读全文
posted @ 2015-08-30 20:17
UniqueColor
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DescriptionGiven n, a positive integer, how many positive integers less than n are relatively prime to n? Two integers a and b are relatively prime if... 阅读全文
posted @ 2015-08-30 18:05
UniqueColor
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DescriptionLet's play a card game called Gap. You have 28 cards labeled with two-digit numbers. The first digit (from 1 to 4) represents the suit of t... 阅读全文
posted @ 2015-08-30 17:52
UniqueColor
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DescriptionThe police office in Tadu City decides to say ends to the chaos, as launch actions to root up the TWO gangs in the city, Gang Dragon and Ga... 阅读全文
posted @ 2015-08-30 13:19
UniqueColor
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