Mathematical Brain Benders: Miscellany of Puzzles

(Dover Recreational Math)


Stephen Barr

Dover Publications | 1982 | 221 páginas | pdf | 4,5 Mb

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Challenge yourself with over 100 fresh paradoxes, puzzles, riddles, conundrums, word and number games for the jaded, skeptical puzzlist. Over 100 pages of comprehensive answers. Approximately 300 illustrations. "Excellent collection of unusual, offbeat, and completely original puzzles." — Scientific American

CONTENTS
1 Rollers 19
2 Owls' Eggs 20
3 Conical Helix 21
4 The Owl Island Flag 22
5 Pseudo-Moebius Strip 23
6 The Butler and the Crumbs 24
7 The Three Clocks 25
8 Slit Strips 26
9 The Pot on the Crosspiece 28
10 For Scrabble Players 29
11 Area of Roof 31
12 Paper-Folding 31
13 The Two Pyramids 32
14 The Man Who Gave Up Smoking 33
15 Tetrahedron Angles 37
16 Hypocycloids 38
17 Squares on a Circle 39
18 Three Coins 40
19 Two Coins 40
20 The Coin Collector's Nightmare 41
21 The Hi-q, Set 42
22 Cryptarithmetic 43
23 Origametry 44
24 The Hauberk 45
25 More Origametry 46
26 Unique Parts of Letters 46
27 For

28 The Truck Gardens 48
29

30 The Cockeyed Kite 51
31 More

32 The Bookmark 52
33 Snow on the Roof 53
34 Drafting Puzzle 54
35 The Psychedelic Cube 55
36 Construction Problem 56
37 A Walk in a Field 57
38 More Diagonals 58
39 Short Proof (Cut Cube) 59
40 Word-Changing 60
41 Polyhedral Model 61
42 Dihedral Angles 62
43 Cheese Wedges 63
44 The Poisoned Glass 64
45 To Cover a Circle 65
46 Pure Origami Solution 66
47 The Flat Pan 67
48 The Siamese Moebius Strip 68
49 The Nine Digits 69
SO Minimum Area 70
51 Cocyclic Points 71
52 The Tilted Carton 72
53 Topology Puzzle 74
54 The Vanadium Steel Clothesline 75
55 Visualizing 77
56 The Balance 78
57 Hydraulic Inference 79
58 The Striped Whatsis 79
59 The Terri Turnover 80
60 The Heavy Chest 81
61 The Pile and the Patriot 83
62 The Pillar of Chios 88
63 literary Quiz 89
64 Thunder on the Right 90
65 Two Triangles 91