Math Gold Medalist

Lor

2024 AMC 8 

Problem 1

What is the ones digit of\[222,222-22,222-2,222-222-22-2?\]$\textbf{(A) } 0\qquad\textbf{(B) } 2\qquad\textbf{(C) } 4\qquad\textbf{(D) } 6\qquad\textbf{(E) } 8$

Modular Arithmetic

-8 is congruent to 2 mod 10

2023 AMC 10B Problem 8

   Solution