Let g0(n), g1(n), g2(n), g3(n) be the quantities of the numbers satisfying the given condition which end by the digits 0, 1, 2, 3 respectively. Then g(n)=g0(n)+g1(n)+g2(n)+g3(n). By condition,
g0(n+1)g1(n+1)g2(n+1)g3(n+1)=g0(n)+g1(n)+g3(n)=g(n)−g2(n),=g(n)−g1(n),=g(n)−g0(n),=g(n).
Summing all the equalities, we get
g(n+1)=3g(n)+g3(n)=3g(n)+g(n−1).
Note that modulo 11 we have g(1)≡3, g(2)≡10, g(3)≡0, g(4)≡10, g(5)≡8, g(6)≡1, g(7)≡0, g(8)≡1, g(9)≡3, g(10)≡10. Now we see that residues of the numbers g(n) modulo 11 repeat periodically with period 8. So, g(n)≡0(mod11) iff n≡3(mod8) or n≡7(mod8), whence g(2010)≡0(mod11), g(2011)≡0(mod11).