Question 1174984
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<pre>

Let x be the "ones" digit.


Then the "tens" digit is (x+1) and the "hundreds" digit is  ((x+1)+1) = (x+2).


From the condition,


    x + (x+1) + (x+2) = 15,


which implies


    3x = 15 - 3 = 12


     x          = 12/3 = 4.


<U>ANSWER</U>.  The number is  654.
</pre>


Solved.


The problem is &nbsp;SO &nbsp;SIMPLE &nbsp;that the solution requires only several lines.