The number n equals =? 6,34d,217 is divisible by 11. since its alternating sum of digits is 6 minus ? 3 plus +4 minus ? d plus +2 minus ? 1 plus +7 equals =? (6 plus +4 plus +2 plus +? 7) minus plus +d plus +? 1) equals =15 minus ? ? d, the divisibility by 11 test means that d equals =4. determine the unknown digit? a, b, or c in the following? numbers, knowing that each is divisible by 11. complete parts? (a) through? (c) below. click the icon to view the divisibility by 11 test.