Probably still legal tender for small debts, but I doubt 7-11 would take them. But it raises an interesting generalization: Prices are frequently "2 for 1.29". Suppose we ignore the custom of rounding up (.645 -> .65), and allow (positive) rationals in the solution. It's not clear to me that the set of solutions is still finite, and my enumeration methods would only work if the denominators are bounded. Rich -----Original Message----- From: R. William Gosper To: math-fun@mailman.xmission.com Sent: 12/4/2003 11:19 PM Subject: Re: [math-fun] 7.11 puzzle Are half-cents still legal tender?-) 1.125, 1.28, 3.125, 1.58 _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun