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On buying postage stamps

Published online by Cambridge University Press:  01 August 2016

John Gilder*
Affiliation:
Department of Mathematics, U.M.I.S.T., Manchester

Extract

At the time of writing, second class stamps cost 12p and first class 17p. To minimise the amount of change in my pocket I have a preference for buying these stamps in ratios that cost a whole number of pounds.

Type
Research Article
Copyright
Copyright © Mathematical Association 1987

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