Multiple choice Find the missing number in the following series. 27, 29, 33, ?, 57 30 41 40 35 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The pattern is +2, +4, +8, +16 - each difference doubles. 27 + 2 = 29, 29 + 4 = 33, 33 + 8 = 41, 41 + 16 = 57. The missing number is 41.