Download The Moscow Puzzles: 359 Mathematical Recreations by Boris A. Kordemsky PDF

By Boris A. Kordemsky

Most well-liked Russian puzzle publication ever released. Marvelously assorted puzzles starting from basic "catch" riddles to tricky difficulties. Lavishly illustrated with transparent diagrams and fun sketches. Edited for English-readers, whereas keeping heat and grace of unique. low-cost variation of first English translation. creation by means of Martin Gardner. 425 line illustrations. strategies.

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Sample text

W h a t do I see in it ? A chain letter. This seems to turn up every now and then in one form or another. I began to wonder. If one person sends a certain letter to two friends, asking each of them to copy the letter and send it to two of their friends, those in turn each send two letters to two of their friends and so on how many letters would have been sent by the time the letter did thirty sets. I calculated and I had a surprise waiting for me. The answer was gigantic. W h a t do you think the answer was?

S o m e people began to look for bits of papers and pencil in their pockets evidently to calculate their chances. But no one went forward. The magician renewed his offer once agaig. 'What, no takers. ' There was silence in the auditorium. 'Perhaps you think it is too m u c h to give me Rs5/- in exchange of RslOO/- Alright I'll take only Rs3/-. O f course, in the same denominations as I mentioned already. Twenty coins. How about that n o w ? ' N o one stirred. 'Alright, alright! The magician went on.

Then Pallavi took two-fifths of what was remaining to tie her pony tail'. 'I see'. 'Now all 1 have left is 30 centimetres. ' H o w much string did I give M a m m u in the first place? 53 Tail or Head Supposing six coins are flipped, what is the probability of at least getting one tail? 54 A Division Problem C a n you divide 1000 into two parts such that one part is a multiple of 47 and the other a multiple of 19? 29 104 - Count the Squares Guess how many squares are there in this figure. 56 The Case of the Missing Digit A friend of mine asked me to write down any multidigit number.

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