Posted by bea on Thursday, September 29, 2011 at 3:01am.
The sum of the digits of 36 is 9.
You are looking for a number that is between 36 and 45 and whose digits add up to 9. You could just run through the possibilities.
37 -> 10
38 -> 11
39 -> 12
40 -> 4
41 -> 5
42 -> 6
43 -> 7
44 -> 8
45 -> 9
There you have it, the answer is 45.
thanks, Jesse
45 is the only thing it could be.
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