Question 10
What is the units digit of $ 1+11+111+\ldots+\underbrace{111\ldots111}_{2020\ 1's} $?
IMAS 2020 — Middle Primary Grades 3–4 — Round 1 Question 10
IMAS · IMAS 2020 — Middle Primary Grades 3–4 — Round 1
IMAS · IMAS 2020 — Middle Primary Grades 3–4 — Round 1