IKMC 2027 - Grades 9-10 - Self-study SET 5 - Thematic Batch 3 Question 7

The eight-digit positive integer $n=\overline{abcdefgh}$ is divisible by 11. Consider $k=\overline{hgfedcba}$, $l=\overline{efghabcd}$ and $m=\overline{adebcfgh}$. How many of k, l, m are divisible by 11?