Series Completion Test Questions with Answers | Mental Ability | Page 13

Mental Ability – Series Completion Test Questions with Answers help aspirants sharpen their logical reasoning and pattern recognition skills. This section includes number, alphabet, and figure series problems often asked in SSC, RRB, IBPS, and other aptitude-based exams. Practicing reasoning questions and answers enhances analytical speed and improves test accuracy. Each problem is carefully designed with explanations that help identify missing terms or patterns in a logical sequence. These series completion tests play a key role in assessing mental alertness and decision-making speed, both crucial in competitive exams. Candidates can practice reasoning questions for competitive exams online and download PDFs for systematic preparation. Boost your logical thinking with these mental ability questions today.

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Q121

Find out the wrong term. 5, 10, 40, 80, 320, 550, 2560

A 80
B 320
C 550
D 2560

Answer: Option C

Q122

Find out the wrong term. 3, 2, 8, 9, 13, 22, 18, 32, 23, 42

A 8
B 9
C 13
D 22

Answer: Option B

Q123

Find out the wrong term. 8, 27, 125, 343, 1331

A 8
B 343
C 1331
D None of these

Answer: Option D

Q124

Find out the wrong term. 10, 14, 28, 32, 64, 68, 132

A 28
B 32
C 64
D 132

Answer: Option D

Explanation: Alternately, the numbers are increased by four and doubled to get the next number. Thus, 10 + 4 =14,; 14 * 2 = 28; 28 + 4 = 32; 32 + 2 = 64 and so on. So. 132 is wrong ad must be replaced by (68 * 2 ) i.e. 136.

Q125

Find out the wrong term. 1, 5, 5, 9, 7, 11, 11, 15, 12, 17

A 11
B 12
C 17
D 15

Answer: Option D

Q126

Find out the wrong term. 11, 2, 21, 3, 32, 4, 41, 5, 51, 6

A 21
B 11
C 32
D 51

Answer: Option C

Q127

Find out the wrong term. 11,5, 20, 12, 40, 26, 74, 54

A 5
B 20
C 40
D 26

Answer: Option C

Q128

Find out the wrong term. 56, 72, 90, 110, 132, 150

A 72
B 90
C 110
D 150

Answer: Option D

Q129

Find out the wrong term. 8, 13, 21, 32, 47, 63, 83

A 13
B 32
C 47
D 63

Answer: Option C

Q130

Find out the wrong term. 89, 78, 86, 80, 85, 82, 83

A 83
B 82
C 86
D 78

Answer: Option C

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Mental ability-Series Completion Test Questions and Answers

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