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Description A simple mathematical formula for e is where n is allowed to go to infinity. This can actually yield very accurate approximations of e usi 阅读全文
摘要：
Description A number of students sit in a circle facing their teacher in the center. Each student initially has an even number of pieces of candy. Whe 阅读全文
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Description "OK, you are not too bad, em... But you can never pass the next test." feng5166 says. "I will tell you an odd number N, and then N integer 阅读全文