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How many positive integers less than 1000 have at least one digit of 9?

 Nov 13, 2021
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2 nines    *99, 9*9,  99*     8+9+9 = 26

3 nines    999                               =  1

 

1 nine

**9             8*9=72

*9*             8*9 = 72

9**            9*9=81

 

so I get       26+1+72+72+81  = 

 Nov 13, 2021
edited by Melody  Nov 13, 2021

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