Skip to content / Đến nội dung
ThichHocToan.com

MathNet 2020 — Math Olympiad Vault — Part 04 Question 100

Math Olympiad Vault · MathNet 2020 — Math Olympiad Vault — Part 04

Question 100

Aisha writes every integer from 1 to 2020. What is the number of written digits “1” minus the number of written digits “0”?
(A) $78$
(B) $1010$
(C) $1089$
(D) $2020$
(E) $5005$