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2007 iTest Problems/Problem 33

Revision as of 21:55, 7 October 2014 by Timneh (talk | contribs) (Created page with "== Problem == How many <math>\textit{odd}</math> four-digit integers have the property that their digits, read left to right, are in strictly decreasing order? == Solution ==")
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Problem

How many $\textit{odd}$ four-digit integers have the property that their digits, read left to right, are in strictly decreasing order?

Solution

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