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Let x be a two-digit number. If the sum of the digits of x is 9, then the ... ...

Let x be a two-digit number. If x > 0, and the sum of the digits of x is 9, then the sum of the digits of the number (x + 10) is:


(A) 1    
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Press: Set E - Number Theory

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Replies to This Thread: 1 | ----
Let x be a two-digit number. If the sum of the digits of x is 9, then the ... ... 
Posted: 01/03/2014 13:52
could it be a negative number?like -72?
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Reply 1 of 1
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Posted: 01/13/2014 17:33
Mak, that's a good point. The problem should have stated x>0.
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