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IBPS PO Series Questions with Answers & Explanations

20 Series questions from the Quantitative Aptitude section of IBPS PO, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.

Question 1

What comes next in the series? 10, 13, 24, 27, 38, ?

  1. A35
  2. B46
  3. C36
  4. D38
  5. E41
Show answer
Answer: (E) 41 The differences alternate between +3 and +11.
Question 2

What comes next in the series? 12, 25, 51, 103, 207, ?

  1. A415
  2. B416
  3. C425
  4. D412
  5. E405
Show answer
Answer: (A) 415 Each term is (previous Γ— 2) + 1.
Question 3

What comes next in the series? 16, 25, 36, 49, 64, ?

  1. A81
  2. B71
  3. C82
  4. D80
  5. E79
Show answer
Answer: (A) 81 The terms are consecutive perfect squares.
Question 4

What comes next in the series? 12, 36, 108, 324, 972, ?

  1. A2922
  2. B2913
  3. C2916
  4. D2906
  5. E2919
Show answer
Answer: (C) 2916 Each term is multiplied by 3.
Question 5

What comes next in the series? 125, 216, 343, 512, 729, ?

  1. A1000
  2. B1005
  3. C997
  4. D1003
  5. E995
Show answer
Answer: (A) 1000 The terms are consecutive perfect cubes.
Question 6

What comes next in the series? 64, 125, 216, 343, 512, ?

  1. A731
  2. B727
  3. C729
  4. D732
  5. E728
Show answer
Answer: (C) 729 The terms are consecutive perfect cubes.
Question 7

What comes next in the series? 8, 11, 14, 17, 20, ?

  1. A24
  2. B21
  3. C20
  4. D23
  5. E25
Show answer
Answer: (D) 23 Each term increases by 3.
Question 8

What comes next in the series? 14, 24, 34, 44, 54, ?

  1. A69
  2. B65
  3. C63
  4. D64
  5. E58
Show answer
Answer: (D) 64 Each term increases by 10.
Question 9

What comes next in the series? 4, 5, 7, 10, 14, ?

  1. A24
  2. B18
  3. C25
  4. D9
  5. E19
Show answer
Answer: (E) 19 The differences increase by 1 each time.
Question 10

What comes next in the series? 13, 39, 117, 351, 1053, ?

  1. A3164
  2. B3159
  3. C3158
  4. D3165
  5. E3149
Show answer
Answer: (B) 3159 Each term is multiplied by 3.

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Question 11

What comes next in the series? 27, 64, 125, 216, 343, ?

  1. A515
  2. B509
  3. C518
  4. D506
  5. E512
Show answer
Answer: (E) 512 The terms are consecutive perfect cubes.
Question 12

What comes next in the series? 36, 49, 64, 81, 100, ?

  1. A131
  2. B121
  3. C115
  4. D116
  5. E127
Show answer
Answer: (B) 121 The terms are consecutive perfect squares.
Question 13

What comes next in the series? 8, 13, 20, 25, 32, ?

  1. A31
  2. B37
  3. C34
  4. D39
  5. E36
Show answer
Answer: (B) 37 The differences alternate between +5 and +7.
Question 14

What comes next in the series? 5, 9, 19, 23, 33, ?

  1. A27
  2. B31
  3. C37
  4. D47
  5. E36
Show answer
Answer: (C) 37 The differences alternate between +4 and +10.
Question 15

What comes next in the series? 12, 15, 23, 26, 34, ?

  1. A47
  2. B37
  3. C32
  4. D42
  5. E36
Show answer
Answer: (B) 37 The differences alternate between +3 and +8.
Question 16

What comes next in the series? 3, 7, 15, 31, 63, ?

  1. A121
  2. B124
  3. C128
  4. D130
  5. E127
Show answer
Answer: (E) 127 Each term is (previous Γ— 2) + 1.
Question 17

What comes next in the series? 8, 17, 35, 71, 143, ?

  1. A286
  2. B297
  3. C277
  4. D287
  5. E293
Show answer
Answer: (D) 287 Each term is (previous Γ— 2) + 1.
Question 18

What comes next in the series? 3, 9, 27, 81, 243, ?

  1. A739
  2. B727
  3. C719
  4. D726
  5. E729
Show answer
Answer: (E) 729 Each term is multiplied by 3.
Question 19

What comes next in the series? 125, 216, 343, 512, 729, ?

  1. A999
  2. B1002
  3. C1000
  4. D1005
  5. E1003
Show answer
Answer: (C) 1000 The terms are consecutive perfect cubes.
Question 20

What comes next in the series? 11, 12, 14, 17, 21, ?

  1. A26
  2. B23
  3. C21
  4. D32
  5. E36
Show answer
Answer: (A) 26 The differences increase by 1 each time.

These are RankerClub practice questions written in the IBPS PO pattern. They are not official SSC/IBPS/RRB papers.

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