(i) For 158: Alternating sum = 8 - 5 + 1 = 4. Since 4 is not divisible by 11, 158 is not divisible by 11. The remainder when 158 is divided by 11 is 4. (ii) For 841: Alternating sum = 1 - 4 + 8 = 5. Since 5 is not divisible by 11, 841 is not divisible by 11. The remainder is 5. (iii) For 481: Alternating sum = 1 - 8 + 4 = -3. Since -3 is not divisible by 11, 481 is not divisible by 11. The remainder is 8 (or equivalently, 481 is 8 more than a multiple of 11). (iv) For 5529: Alternating sum = 9 - 2 + 5 - 5 = 7. Since 7 is not divisible by 11, 5529 is not divisible by 11. The remainder is 7. (v) For 90904: Alternating sum = 4 - 0 + 9 - 0 + 9 = 22. Since 22 is divisible by 11, 90904 is divisible by 11. 90904 ÷ 11 = 8264. (vi) For 857076: Alternating sum = 6 - 7 + 0 - 7 + 5 - 8 = -11. Since -11 is divisible by 11, 857076 is divisible by 11. 857076 ÷ 11 = 77916.