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ParthKohli Group Title

Number of 3-digit palindromes... 9 ways for the hundreds place. 9 ways for the tens place. 1 way for the ones place. \(9 \times 9 \times 1 = 81\) which is wrong?

  • one year ago
  • one year ago

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  1. Golferguy158 Group Title
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    why is there only one way for the ones place?

    • one year ago
  2. Golferguy158 Group Title
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    shouldn't there be 9 ways?

    • one year ago
  3. Spacelimbus Group Title
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    you can have 9 in the first place, and 10 in the second place. 111 is also a palindrome.

    • one year ago
  4. ParthKohli Group Title
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    Because the ones place is always equal to the hundreds place.

    • one year ago
  5. ParthKohli Group Title
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    Oh yes!

    • one year ago
  6. Spacelimbus Group Title
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    010 is not a 3 digit number, but a 3 digit palindrome.

    • one year ago
  7. ParthKohli Group Title
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    @LOOSEr I didn't consider 0 for the tens place, whoopies

    • one year ago
  8. Spacelimbus Group Title
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    so I would try it with 90

    • one year ago
  9. LOOSEr Group Title
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    9*10*1=90

    • one year ago
  10. ParthKohli Group Title
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    Yeah, that's right of course :-P

    • one year ago
  11. LOOSEr Group Title
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    10 ways for tens place

    • one year ago
  12. Spacelimbus Group Title
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    ^^

    • one year ago
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