Multiple choice What will come in place of question mark? 1, 3, 7, 15, 31, 63, ? 95 127 128 79 71 Reveal answer Fill a bubble to check yourself B Correct answer Explanation As it is clear from the series, every term of the series is added to the increasing powers of 2 to get the next term. 1 + 21 = 3 3 + 22 = 7 7 + 23 = 15 15 + 24 = 31 31 + 25 = 63 Similarly, 63 + 26 = 127