The document contains 25 questions about series completion problems. Each question provides a series with one missing term and 4 answer options. The explanation for each answer identifies the pattern in the series and uses it to determine the missing term.
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The document contains 25 questions about series completion problems. Each question provides a series with one missing term and 4 answer options. The explanation for each answer identifies the pattern in the series and uses it to determine the missing term.
The document contains 25 questions about series completion problems. Each question provides a series with one missing term and 4 answer options. The explanation for each answer identifies the pattern in the series and uses it to determine the missing term.
Copyright:
Attribution Non-Commercial (BY-NC)
Available Formats
Download as DOCX, PDF, TXT or read online from Scribd
The document contains 25 questions about series completion problems. Each question provides a series with one missing term and 4 answer options. The explanation for each answer identifies the pattern in the series and uses it to determine the missing term.
Copyright:
Attribution Non-Commercial (BY-NC)
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Download as DOCX, PDF, TXT or read online from Scribd
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Verbal Reasoning :: Series Completion
Directions to Solve Choose the correct alternative that will continue the same pattern and replace the question mark in the given series. 1. 120, 99, 80, 63, 48, ? A. C. 35 39 B. D. 38 40
Answer & Explanation
Answer: Option A Explanation: The pattern is - 21, - 19, - 17, - 15,..... So, missing term = 48 - 13 = 35. View Answer Workspace Report Discuss in Forum 2.
589654237, 89654237, 8965423, 965423, ? A. C. 58965 89654 B. D. 65423 96542
Answer & Explanation
Answer: Option D Explanation: The digits are removed one by one from the beginning and the end in order alternately so as to obtain the subsequent terms of the series. View Answer Workspace Report Discuss in Forum 3.
3, 10, 101,? A. C. 10101 10202 B. D. 10201 11012
Answer & Explanation
Answer: Option C Explanation: Each term in the series is obtained by adding 1 to the square of the preceding term. So, missing term = (101)2 + 1 = 10202. View Answer Workspace Report Discuss in Forum 4.
In the series 2, 6, 18, 54, ...... what will be the 8th term ? A. C. 4370 7443 B. D. 4374 7434
Answer & Explanation
Answer: Option B Explanation: Clearly, 2 x 3 = 6, 6 x 3 = 18, 18 x 3 = 54,..... So, the series is a G.P. in which a = 2, r = 3. Therefore 8th term = ar8-1 = ar7 = 2 x 37 = (2 x 2187) = 4374. View Answer Workspace Report Discuss in Forum 5.
125,80,45,20,? A. C. 5 10 B. D. 8 12
Answer & Explanation
Answer: Option A Explanation: The pattern is - 45, - 35, - 25, ..... So, missing term = 20 - 15 = 5. 6. 1, 1, 4, 8, 9, 27, 16, ?
A. C.
32 81
B. D.
64 256
Answer & Explanation
Answer: Option B Explanation: The series consists of squares and cubes of consecutive natural numbers i.e. 12, 13, 22, 23, 32, 33, 42, ..... So, missing term = 43 = 64. View Answer Workspace Report Discuss in Forum 7.
1, 2, 3, 6, 9, 18, ?, 54 A. C. 18 36 B. D. 27 81
Answer & Explanation
Answer: Option B Explanation: The pattern is x 2, x 3/2, x 2, x 3/2, x 2,..... So, missing term = 18 x 3/2 = 27. View Answer Workspace Report Discuss in Forum
8.
6, 13, 25, 51, 101, ? A. C. 201 203 B. D. 202 205
Answer & Explanation
Answer: Option C Explanation:
The pattern is x 2 + 1, x 2 - 1, x 2 + 1, x 2 - 1,..... So, missing term = 101 x 2 + 1 = 203. View Answer Workspace Report Discuss in Forum
9.
105, 165, 195, 255, 285, 345, ? A. C. 395 420 B. D. 390 435
Answer & Explanation
Answer: Option D Explanation: Each number of the series is 15 multiplied by a prime number i.e. 15 x 7, 15 x 11, 15 x 13, 15 x 17, 15 x 19, 15 x 23,..... So, missing term = 15 x 29 = 435. View Answer Workspace Report Discuss in Forum
10. 5,6,9, 15, ?, 40 A. C. 21 27 B. D. 25 33
Answer & Explanation
Answer: Option B Explanation: The pattern is + 1, + 3, + 6,....., i.e. + 1, + (1, + 2), + (1 + 2 + 3),..... So, missing term = 15 + (1 + 2 + 3 + 4) = 25. 11. 1, 3, 4, 8, 15, 27, ? A. B. 37 . 44
C. D.
50 55
Answer & Explanation
Answer: Option C Explanation: The sum of any three consecutive terms of the series gives the next term. So, missing number = 8 + 15 + 27 = 50. View Answer Workspace Report Discuss in Forum 12. 3, 4, 7, 7, 13, 13, 21, 22, 31, 34, ? A. C. 42 51 B. D. 43 52
Answer & Explanation
Answer: Option B Explanation: The given sequence is a combination of two series : I. 3, 7, 13, 21, 31, ? and II. 4, 7, 13, 22, 34 The pattern in I is + 4, + 6, + 8, + 10,..... The pattern in II is + 3, + 6, + 9, + 12,..... So, missing term = 31 + 12 = 43. View Answer Workspace Report Discuss in Forum
13. 198, 194, 185, 169, ? A. C. 92 136 B. D. 112 144
Answer & Explanation
Answer: Option D Explanation: The pattern is - 4, - 9, - 16,.....i.e. - 22, - 32, - 42,..... So, missing pattern = 169 - 52 = 169 - 25 = 144. View Answer Workspace Report Discuss in Forum
14. 2, 3, 5,7,11,?, 17 A. C. 12 14 B. D. 13 15
Answer & Explanation
Answer: Option B Explanation: Clearly, the given series consists of prime numbers starting from 2. So, the missing term is the prime number after 11, which is 13. View Answer Workspace Report Discuss in Forum
15. 6, 12, 21, ?, 48 A. C. 33 40 B. D. 38 45
Answer & Explanation
Answer: Option A Explanation: The pattern is + 6, + 9, + 12, + 15, ..... So, missing term = 21 + 12 = 33. 16. Which term of the series 5, 10, 20, 40, ..... is 1280? A. 10th
B. C. D.
9th 8th None of these
Answer & Explanation
Answer: Option B Explanation: Clearly, 5 x 2 = 10, 10 x 2 = 20, 20 x 2 = 40,..... So, the series is a G.P. in which a = 5 and r = 2. Let 1280 be the rath term of the series. Then, 5x2n-1 = 1280 2n-1 = 256 = 28 n-1=8 n = 9.
View Answer Workspace Report Discuss in Forum 17. 2, 5, 9, ?, 20, 27 A. C. 14 18 B. D. 16 24
Answer & Explanation
Answer: Option A Explanation: The pattern is + 3, + 4, + 5, + 6,..... So, missing term = 9 + 5 = 14. View Answer Workspace Report Discuss in Forum
18. 2, 3, 3, 5, 10, 13, ?, 43, 172, 177 A. C. 23 39 B. D. 38 40
Answer & Explanation
Answer: Option C Explanation: The pattern is + 1, x 1, + 2, x 2, + 3, x 3, + 4, x 4, + 5. So, missing term = 13 x 3 = 39. View Answer Workspace Report Discuss in Forum
19. 9, 27, 31, 155, 161, 1127, ? A. C. 316 1288 B. D. 1135 2254
Answer & Explanation
Answer: Option B Explanation: The pattern is x 3, + 4, x 5, + 6, x 7,..... So, missing term = 1127 + 8 = 1135. View Answer Workspace Report Discuss in Forum
20. 2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11, ? A. C. 9 11 B. D. 10 12
Answer & Explanation
Answer: Option B Explanation: The given sequence is a combination of three series : I. 1st, 4th, 7th, 10th, 13th terms i.e. 2, 4, 6, 8, ? II. 2nd, 5th, 8th, 11th terms i.e. 1, 4, 7, 10
III. 3rd, 6th, 9th, 12th terms i.e. 2, 5, 8, 11 Clearly, I consists of consecutive even numbers. So, the missing term is 10. 21. Which of the following will not be a number of the series 1, 8, 27, 64, 125,.....? A. C. 256 729 B. D. 512 1000
Answer & Explanation
Answer: Option A Explanation: The given series consists of cubes of natural numbers only. 256 is not the cube of any natural number. View Answer Workspace Report Discuss in Forum 22. 13, 32, 24, 43, 35, ?, 46, 65, 57, 76 A. C. 45 54 B. D. 52 55
Answer & Explanation
Answer: Option C Explanation: The given sequence is a combination of two series: I. 13, 24, 35, 46, 57 and II. 32, 43, ?, 65, 76 The pattern in both I and II is + 11. So, missing term = 43 + 11 = 54. View Answer Workspace Report Discuss in Forum
23. 22, 24, 28, ?, 52, 84 A. C. 36 42 B. D. 38 46
Answer & Explanation
Answer: Option A Explanation: The pattern is + 2, + 4, + 8, + 16,..... So, missing term = 28 + 8 = 36. View Answer Workspace Report Discuss in Forum
24. 3, 15, ?, 63, 99, 143 A. C. 27 45 B. D. 35 56
Answer & Explanation
Answer: Option B Explanation: The terms of the given series are (22 - 1), (42 - 1),....., (82 - 1), (102 - 1), (122 - 1). So, missing term = (62 - 1) - (36 - 1) = 35. View Answer Workspace Report Discuss in Forum
25. 90, 180, 12, 50, 100, 200, ?, 3, 50, 4, 25, 2, 6, 30, 3 A. C. 150 225 B. D. 175 250
Answer & Explanation
Answer: Option A Explanation: Clearly, 90 = 30 x 3, 180 = 6 x 30, 12 = 2 x 6, 50 = 25 x 2, 100 = 4 x 25, 200 = 50 x 4. So, missing term = 3 x 50 = 150.
