Amusements in Mathematics by Henry Ernest Dudeney
page 29 of 735 (03%)
page 29 of 735 (03%)
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"What good did that do yer?" "Well, it meant five more oranges on every ten shillin's-worth." Now, what price did Bill actually pay for the oranges? There is only one rate that will fit in with his statements. AGE AND KINSHIP PUZZLES. "The days of our years are threescore years and ten." --_Psalm_ xc. 10. For centuries it has been a favourite method of propounding arithmetical puzzles to pose them in the form of questions as to the age of an individual. They generally lend themselves to very easy solution by the use of algebra, though often the difficulty lies in stating them correctly. They may be made very complex and may demand considerable ingenuity, but no general laws can well be laid down for their solution. The solver must use his own sagacity. As for puzzles in relationship or kinship, it is quite curious how bewildering many people find these things. Even in ordinary conversation, some statement as to relationship, which is quite clear in the mind of the speaker, will immediately tie the brains of other people into knots. Such expressions as "He is my uncle's son-in-law's sister" convey absolutely nothing to some people without a detailed and laboured explanation. In such cases |
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