word problem
posted by bea .
The number whose digits have a sum the same as the digits in 36. This number is less than 50 and greater than 36.

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.