[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-139515-en":3,"doc-seo-139515-105":30,"detail-sidebar-cat-0-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":20,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},139515,962084926284,"Aria Callaghan","https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0",2,"Literature","Amusements in Mathematics - read online free","Amusements in Mathematics is a collected volume of Henry Ernest Dudeney’s mathematical puzzles presented for enjoyment, with solutions discussed more fully than in magazines or newspapers. The preface explains the purpose of presenting logic and mathematics through approachable challenges, tracing the role of puzzles in the development of exact thinking. It also notes the historical and cultural context behind some problems and introduces conventions for values, symbols, and number representations used to solve the tasks.","Amusements in Mathematics 1  \nAmusements in Mathematics  \nAmusements in Mathematics  \n\n| Project Gutenberg's Amusements in Mathematics, by Henry Ernest Dudeney This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at [www.gutenberg.net](www.gutenberg.net)\u003Cbr>Title: Amusements in Mathematics\u003Cbr>Author: Henry Ernest Dudeney\u003Cbr>Release Date: September 17, 2005 [EBook \\#16713]\u003Cbr>Language: English\u003Cbr>Character set encoding: ISO-8859-1\u003Cbr>*** START OF THIS PROJECT GUTENBERG EBOOK AMUSEMENTS IN MATHEMATICS *** |\n| --- |\n| Produced by Stephen Schulze, Jonathan Ingram and the Online Distributed Proofreading Team at [http://www.pgdp.net](http://www.pgdp.net) |\n\n[Transcribers note: Many of the puzzles in this book assume a familiarity with the currency of Great Britain in the early 1900s. As this is likely not common knowledge for those outside Britain (and possibly many within,) I am including a chart of relative values.  \nAmusements in Mathematics 2  \nThe most common units used were:  \nthe Penny, abbreviated: d. (from the Roman penny, denarius) the Shilling, abbreviated: s. the Pound, abbreviated: £  \nThere was 12 Pennies to a Shilling and 20 Shillings to a Pound, so there was 240 Pennies in a Pound.  \nTo further complicate things, there were many coins which were various fractional values of Pennies, Shillings or Pounds.  \nFarthing ¼d.  \nHalf-penny ½d.  \nPenny 1d.  \nThree-penny 3d.  \nSixpence (or tanner) 6d.  \nShilling (or bob) 1s.  \nFlorin or two shilling piece 2s.  \nHalf-crown (or half-dollar) 2s. 6d.  \nDouble-florin 4s.  \nCrown (or dollar) 5s.  \nHalf-Sovereign 10s.  \nSovereign (or Pound) £1 or 20s.  \nThis is by no means a comprehensive list, but it should be adequate to solve the puzzles in this book.  \nExponents are represented in this text by ^, e.g. '3 squared' is 3^2 .  \nNumbers with fractional components (other than ¼, ½ and ¾) have a + symbol separating the whole number component from the fraction. It makes the fraction look odd, but yeilds correct solutions no matter how it is interpreted. E.G., 4 and eleven twenty-thirds is 4+11/23, not 411/23 or 4-11/23 .  \n]  \nAMUSEMENTS IN MATHEMATICS  \nby  \nHENRY ERNEST DUDENEY  \nIn Mathematicks he was greater Than Tycho Brahe or Erra Pater: For he, by geometrick scale, Could take the size of pots of ale; Resolve, by sines and tangents, straight, If bread or butter wanted weight; And wisely tell  \nAmusements in Mathematics 3  \nwhat hour o' th' day The clock does strike by algebra.  \nBUTLER'S Hudibras.  \n1917  \nPREFACE  \nIn 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.  \nOn 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 ","cbCaiqFaazXt5OZA","https://ap.wps.com/l/cbCaiqFaazXt5OZA","pdf",869783,1,294,"English","en",105,"# Preface\n## Purpose of the collection\n## Mathematics, logic, and reasoning\n## Presentation, difficulty, and conventions","[{\"question\":\"What is the purpose of Amusements in Mathematics?\",\"answer\":\"The volume aims primarily to amuse while still offering opportunities to gain knowledge through the process of solving puzzles.\"},{\"question\":\"Does the book include both old and newly presented puzzles?\",\"answer\":\"Yes. It includes a few puzzles known to the world for generations, while most of the problems are described as original.\"},{\"question\":\"Why does the preface discuss mathematics history and reasoning?\",\"answer\":\"It connects puzzles to the development of exact thinking and argues that solving even simple puzzles relies on mathematical and logical reasoning.\"}]","Amusements in Mathematics - read online free | PDF",1787551613,453,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":28},"amusements-in-mathematics-read-online-free","",{"@graph":36,"@context":85},[37,53,68],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,47,50],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":11},"https://docshare.wps.com/document/","Document",{"item":48,"name":12,"@type":43,"position":49},"https://docshare.wps.com/document/literature/",3,{"item":51,"name":13,"@type":43,"position":52},"https://docshare.wps.com/document/amusements-in-mathematics-read-online-free/139515/",4,{"url":51,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-04","2026-08-24",true,{"@type":65,"interactionType":66,"userInteractionCount":20},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"What is the purpose of Amusements in Mathematics?","Question",{"text":75,"@type":76},"The volume aims primarily to amuse while still offering opportunities to gain knowledge through the process of solving puzzles.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"Does the book include both old and newly presented puzzles?",{"text":80,"@type":76},"Yes. 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