Question

2la puterea 2011 ultima cifra

Answer 1

$U(2^{2011})=U(2^3 \cdot 2^{2008})=U(2^3 \cdot (2^4)^{502})=U(8 \cdot 16^{502})= \\ =U(8 \cdot 6)=U(48)=8$