Multiple choice Find the missing number in the series- 891, 684, 479, ?, 255 276 125 216 343 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The differences decrease by 2: 891 - 684 = 207, 684 - 479 = 205, 479 - 276 = 203. This gives the missing term 276. The pattern of differences (207, 205, 203, ...) is consistent.