Multiple choice general knowledge math & puzzles Find out the wrong number in the given sequence of numbers: 1, 2, 6, 15, 31, 56, 91 31 91 56 15 Reveal answer Fill a bubble to check yourself B Correct answer Explanation Pattern adds consecutive odd numbers: +1 (2-1), +3 (5-2), +5 (10-5), +7 (17-10), +9 (26-17), +11 (37-26), +13 (50-37). Next should be 50+15=65, but 91 is given. 91 breaks the +15 pattern.