Deduce the numbers - Whatsapp Puzzle

NumberDeduction

/*
solve this....
  (b)(r)(w)
 +(b)(r)(w)
 +(b)(r)(w)
 ----------
  (w)(w)(w)

What numbers are (b),(r),(w)?
*/

(function() {
    for (var i=1; i<10; i++) {
        var sum = 111*i;
        var num = sum/3;
        if ((num)%10 == sum%10) {
            var numStr = num.toString();
            console.log("(b):"+numStr[0]+", (r):"+numStr[1]+", (w):"+numStr[2]);
            break;
        }
    }
})();