Question 78
The value of the expression $10^{2016} - 10^{15}$ is a positive integer. Determine the sum of its digits.
(A) 1
(B) 17
(C) 2001
(D) 18\,000
(E) 18\,009
(A) 1
(B) 17
(C) 2001
(D) 18\,000
(E) 18\,009
Math Olympiad Vault · MathNet 2016-part-05 — 184 problems (EN–VI)