Multiple choice What will come in place of question mark? 10, 11, 13, 14, 16, 17, 19, ? 21 20 18 22 23 Reveal answer Fill a bubble to check yourself B Correct answer Explanation As seen in the question, every number is following the pattern of operations + 1, + 2, + 1, + 2 .... 10 + 1 = 11 11 + 2 = 13 13 + 1 = 14 14 + 2 = 16 16 + 1 = 17 17 + 2 = 19 Similarly, 19 + 1 = 20