How many positive number less than 1000 have sum of there digit 17? Choices: A) 43 B) 53 C) 63 D) 75 E) 76
digits between 1-100 sum 17 =only 2 (89,98)   digits between 101-200 sum 17 =3 (188,179,197)   digits between 201-300 sum 17 = 4 (296,287,278,269)   and so on.....   digits between 301-400 sum 17 =5   digits between 401-500 sum 17 =6   digits between 501-600 sum 17 =7   digits between 601-700 sum 17 =8   digits between 701-800 sum 17 =9   digits between 801-900 sum 17 =10   but in   digits between 901-999 sum 17 =9 (980,971,962,953,944,935,926,917,908)   so total number is   2+3+4+5+6+7+8+9+10+9= 
<gadget id="calculator">2+3+4+5+6+7+8+9+10+9</gadget>
<output>63</output>
63   ANSWER:63
<result>C</result>
How many positive number less than 1000 have sum of there digit 17?