Talk:Positive decimal integers with the digit 1 occurring exactly twice

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Revision as of 17:00, 8 July 2021 by Nigel Galloway (talk | contribs) (Created page with "This is the number of ways to place two ones in three slots, which is three, times the number of ways to place 0,2-9 in the remaining slot, which is nine. So at least twenty s...")
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This is the number of ways to place two ones in three slots, which is three, times the number of ways to place 0,2-9 in the remaining slot, which is nine. So at least twenty seven is the correct answer. Surely somewhere this task is already covered.--Nigel Galloway (talk) 17:00, 8 July 2021 (UTC)

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