Download e-book for iPad: Amusements in Mathematics Dudeney by Henry E. Dudeney

By Henry E. Dudeney

In issuing this quantity of my Mathematical Puzzles, of which a few have seemed in periodicals and others are given right here for the 1st time, i need to recognize the encouragement that i've got obtained from many unknown correspondents, at domestic and out of the country, who've expressed a wish to have the issues in a accrued shape, with the various suggestions given at larger size than is feasible in magazines and newspapers. even though i've got integrated a couple of previous puzzles that experience the realm for generations, the place I felt that there has been whatever new to be stated approximately them, the issues are broadly speaking unique. it really is actual that a few of these became well known in the course of the press, and it's attainable that the reader could be completely happy to understand their source.
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Trivet, tributary, triptych, trident, triad 14 5 2 3 9 8 4 11 5 14 19 13 6 ? 20 27 What number should replace the question mark? 15 5862 is to 714 and 3498 is to 1113 and 9516 is to 156 therefore 8257 is to ? 39 40 Ultimate IQ Tests 16 Which is the missing tile? A B C D E F 17 mohair is to wool as shantung is to: silk, cotton, linen, nylon, fabric 18 Place the numbers 1–6 into the circles, one number per circle, so that: the sum of the numbers 4 and 1, and all the numbers between them total 12; the sum of the numbers 4 and 6, and all the numbers between them total 21; the sum of the numbers 2 and 1, and all the numbers between them total 8.

31 abashed, derail, little, ? What comes next? mellow, entail, leader, elicit, status 32 Produce an eight-letter word by joining together two of these four-letter sets. 33 cred, agon, lues, once, deva, some, come, pent 20 14 12 24 33 3 10 16 15 18 17 7 4 8 5 1 9 30 36 39 21 13 2 6 11 What number is three places away from itself plus three, two places away from itself multiplied by two, two places away from itself less four and two places away from itself divided by three? 43 44 Ultimate IQ Tests 34 ?

10 Arrange the words below into alphabetical order. acescence, acetamide, acerbated, acetified, acellular, acescency, acetabula, acerbates 11 When the above is folded to form a cube, which is the only one of the following that can be produced? A B D C E Test 3 Questions 12 3 9 1 2 8 3 9 ? 2 1 9 1 ? 3 9 1 2 1 9 3 8 2 8 3 9 1 2 8 3 8 2 1 9 3 Which is the missing section? 8 3 3 8 8 2 2 8 8 2 2 8 8 3 3 8 A B C D 13 Solve the anagram in brackets to correctly complete the quotation with a 10-letter word.

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