Question Detail 21,25,33,49,81, ? 140145147159 Answer: Option BExplanation:Pattern is, +4, +8, +16, +32, so next will be +64 81+64 = 145 Similar Questions : 1. 19, 2, 38, 3, 114, 4, ? . Which term should replace the question mark in this series ? 340380456486 Answer: Option CExplanation:Please check the given sequence is combination of two series. Series 1: 19, 38, 114, ... Series 2: 2,3,4 In series 1, Pattern followed is *2, *3, so next will be *4 Next term will be 114*4 = 456 2. 1,1,3,9,6,36,10,100,(..),225 12131415 Answer: Option DExplanation:Given sequence is combination of two series Series 1 : 1,3,6,10,.. Series 2 : 1,9,36,100,225 In series 1 pattern is +2, +3, +4. So next term will be 10+5 = 15 3. Complete the series 20, 19, 17, ...., 10, 5 15161314 Answer: Option DExplanation:Pattern is, -1, -2, ..,.. , -5 So -3 and -4 will fill the blanks to make it a pattern. Next number will be 17-3 = 14 4. Which number should be replaced with x in following series :2, 3, 5, 7, 11, x, 17 12131415 Answer: Option BExplanation:Above series contains prime number series. So after 11, 13 is next prime number. 5. 36, 34, 30, 28, 24, ... What number should come next? 22201816 Answer: Option AExplanation:Pattern in the series is, -2, -4, -2, -4. So next term will be -2 24 -2 = 22 Read more from - Series Completion Questions Answers