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소설
In issuing this volume of my Mathematical Puzzles, of which some have appeared in periodicals and others are given here for the first time, I must acknowledge the encouragement that I have received from many unknown correspondents, at home and abroad, who have expressed a desire to have the problems in a collected form, with some of the solutions given at greater length than is possible in magazines and newspapers. Though I have included a few old puzzles that have interested the world for generations, where I felt that there was something new to be said about them, the problems are in the main original. It is true that some of these have become widely known through the press, and it is possible that the reader may be glad to know their source.
On the question of Mathematical Puzzles in general there is, perhaps, little more to be said than I have written elsewhere. The history of the subject entails nothing short of the actual story of the beginnings and development of exact thinking in man. The historian must start from the time when man first succeeded in counting his ten fingers and in dividing an apple into two approximately equal parts. Every puzzle that is worthy of consideration can be referred to mathematics and logic. Every man, woman, and child who tries to "reason out" the answer to the simplest puzzle is working, though not of necessity consciously, on mathematical lines. Even those puzzles that we have no way of attacking except by haphazard attempts can be brought under a method of what has been called "glorified trial"—a system of shortening our labours by avoiding or eliminating what our reason tells us is useless. It is, in fact, not easy to say sometimes where the "empirical" begins and where it ends.
© 2016 anboco (전자책 ): 9783736405646
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전자책 : 2016년 7월 30일
국내 유일 해리포터 시리즈 오디오북
5만권이상의 영어/한국어 오디오북
키즈 모드(어린이 안전 환경)
월정액 무제한 청취
언제든 취소 및 해지 가능
오프라인 액세스를 위한 도서 다운로드
친구 또는 가족과 함께 오디오북을 즐기고 싶은 분들을 위해
2-3 계정
무제한 청취
2-3 계정
무제한 청취
언제든 해지하실 수 있어요
2 개 계정
17900 원 /월한국어
대한민국