Question

aflati ultima cifra a nr A=15la 6x24la 8 +1234

Answer 1

u(15^6)=5

u(24^8)=u[(24)^2]^4=u(576^4)=6

u(1234) = 4

u(A)= u(5+6+4)=u(15)=5

Answer 2

A=15^6x24^8+1234
U(15^6)=5
U(24^8)=U(24^4x2)=U(24^4)^2=U(6^2)=6
U(5+6+4)=U(1+4)=5