Question 14
Find the units digit of $2+2^2+2^3+\cdots+2^{2020}+2^{2021}$.
TIMO 2020 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 2 Question 14
TIMO · TIMO 2020 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 2
TIMO · TIMO 2020 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 2