Skip to content / Đến nội dung
ThichHocToan.com

MathNet 2019-part-04 — 184 problems (EN–VI) Question 55

Math Olympiad Vault · MathNet 2019-part-04 — 184 problems (EN–VI)

Question 55

Farida makes a list of the integers between $1$ and $10,\!000$ that are divisible by $7$. For every number on the list she adds the digits of the number. What is the smallest number that occurs as an outcome?
A) $1$ B) $2$ C) $3$ D) $4$ E) $5$