Skip to main content
OlympiadHQ

Browse · harp

Print

smc

number theory senior

Problem

Let equal the sum of the digits of positive integer . For example, . For a particular positive integer , . Which of the following could be the value of ?
(A)
(B)
(C)
(D)
Solution
Note that , so . So, since , we have that . The only one of the answer choices is .
Final answer
D