Question

Let $S(n)$ denote the sum of the digits of a positive integer n. e.g. $S(178)=1+$ $7+8=16 .$ Then, the value of $S(1)+S(2)+S(3)+\ldots+S(99)$ is

• A. 476
• B. 998
• C. 782
• D. 900

Answer 1

Answer: (D)

900

Answer 2

$S(1)+S(2)+S(3)+\ldots+S(99)=$ Sum of digits of counting numbers 1 to 99 .