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mathmath333

  • one year ago

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  1. mathmath333
    • one year ago
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    How many 3 digit numbers can be generated from 1,2,3,4,5,6,7,8,9 such that the digits are in ascending order?

  2. triciaal
    • one year ago
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    sorry I can't think about this

  3. triciaal
    • one year ago
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    @Nnesha @Jhannybean

  4. triciaal
    • one year ago
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    @zepdrix

  5. wolf1728
    • one year ago
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    So I guess the first few numbers are 123 124 125 and so on?

  6. mathmath333
    • one year ago
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    yes also these can happen 789,689

  7. wolf1728
    • one year ago
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    Numbers beginning with 12 - 7 numbers 13 - 6 numbers 14 - 5 numbers 15 - 4 numbers 16 - 3 numbers 17 - 2 numbers 18 - 1 number

  8. wolf1728
    • one year ago
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    Numbers beginning with 1 28

  9. wolf1728
    • one year ago
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    Numbers beginning with 23 - 6 numbers 24 - 5 26 - 4 27 - 3 28 - 2 29 - 1 Total numbers 21

  10. wolf1728
    • one year ago
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    Numbers beginning with 3 = 5 + 4 + 3 + 2 + 1 = 15

  11. wolf1728
    • one year ago
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    Numbers beginning 4 = 4 + 3 + 2 + 1 = 10

  12. mathmath333
    • one year ago
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    is it 28+21+15+10+6+3+1 reverse triangular numbers

  13. wolf1728
    • one year ago
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    I'd say that's it :-)

  14. mathmath333
    • one year ago
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    lol it is correct 84 thnks

  15. wolf1728
    • one year ago
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    All right and u r welcome

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