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Suppose n is an integer, such that the sum of the digits of n is 2, and $10^{10} \lt n \lt 10^{11} $. The number of different values for n is:

Let me try to list them :

(1) 11000000000
(2) 10100000000
(3) 10010000000
...
(10)10000000001

So I am getting 10 possible values but the answer is 11.What am I missing here ?

EDIT: I was missing 20000000000.

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    20,000,000,000?2010-10-29
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    Your new question doesn't make sense. Also, it seems better to start a new question instead of replacing an existing one.2010-10-29
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    @ Yuval Filmus : Fixed.2010-10-29
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    The question should not be marked as unanswered.2010-11-22

1 Answers 1

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Per the OP's edit, to remove this from the unanswered question list, the 11th entry is 20,000,000,000.

  • 0
    Thanks,+1 and accepted.:-)2011-03-26
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    Thanks for the points. I've been trolling the unanswered questions.2011-03-27