Number Series Aptitude MCQ Questions with Answers Set 04

Arithmetic Ability Objective Questions and Answers: Number Series

Review structured MCQ sets for General Aptitude Arithmetic Ability Number Series. Built according to official Aptitude guidelines, these downloadable questions support daily revision and core concept reinforcement.

Download Number Series MCQs with Answers

View or download the dedicated Number Series MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Arithmetic Ability evaluations.

Multiple Choice Questions

Question 1: What should come in place of the question mark (?) in the following number series?
160, 80, 120, 300, ?
(a) 1050
(b) 1000
(c) 1040
(d) 1020
(e) 1060
Show Answer & Explanation

Answer: (a) 1050

Explanation:
1. 160 × 0.5 = 80, 80 × 1.5 = 120, 120 × 2.5 = 300.
2. The multiplier increases by 1 each time.
3. ? = 300 × 3.5 = 1050.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 2: What should come in place of the question mark (?) in the following number series?
4, 5, 8, 15, ?
(a) 25
(b) 26
(c) 28
(d) 31
(e) 24
Show Answer & Explanation

Answer: (c) 28

Explanation:
1. Differences: 1, 3, 7.
2. The differences themselves grow by 2, 4, 6..., so the next difference is 7 + 6 = 13.
3. ? = 15 + 13 = 28.

Teacher's Note:
1. First write the differences between consecutive terms; if they are not constant, take differences again or compare them with squares, cubes or powers of 2 and 3.
2. When a series grows by roughly the same factor each time, test multiply-and-add rules such as x × 2 + 1 before trying differences.

Question 3: What should come in place of the question mark (?) in the following number series?
19, 27, 0, 64, ?, 155
(a) 61
(b) 83
(c) -23
(d) 47
(e) Other than the given options
Show Answer & Explanation

Answer: (e) Other than the given options

Explanation:
1. 19 + 23 = 27, 27 - 33 = 0, 0 + 43 = 64.
2. Cubes of 2, 3, 4, 5, 6 are added and subtracted alternately.
3. ? = 64 - 125 = -61; check: -61 + 216 = 155.
4. -61 is not among options (a) to (d).

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

Question 4: What should come in place of the question mark (?) in the following number series?
122, 62, 32, ?, 9.5, 5.75
(a) 19
(b) 24
(c) 17
(d) 20.25
(e) Other than the given options
Show Answer & Explanation

Answer: (c) 17

Explanation:
1. Each term = previous term ÷ 2 + 1.
2. 122 ÷ 2 + 1 = 62, 62 ÷ 2 + 1 = 32.
3. ? = 32 ÷ 2 + 1 = 17; check: 17 ÷ 2 + 1 = 9.5 and 9.5 ÷ 2 + 1 = 5.75.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 5: What should come in place of the question mark (?) in the following number series?
49, 216, 625, 1024, 729, ?
(a) 128
(b) 512
(c) 256
(d) 324
(e) Other than the given options
Show Answer & Explanation

Answer: (a) 128

Explanation:
1. 49 = 72, 216 = 63, 625 = 54, 1024 = 45, 729 = 36.
2. The base falls by 1 while the power rises by 1.
3. ? = 27 = 128.

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

Question 6: What should come in place of the question mark (?) in the following number series?
71, ?, 868, 4345, 26076
(a) 322
(b) 264
(c) 198
(d) 216
(e) Other than the given options
Show Answer & Explanation

Answer: (d) 216

Explanation:
1. Rule: multiply by n and add n, with n = 3, 4, 5, 6.
2. 71 × 3 + 3 = 216, 216 × 4 + 4 = 868.
3. Check: 868 × 5 + 5 = 4345 and 4345 × 6 + 6 = 26076, so ? = 216.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 7: What should come in place of the question mark (?) in the following number series?
1, 12, 144, 1728, ?
(a) 18024
(b) 9962
(c) 20736
(d) 21302
(e) Other than the given options
Show Answer & Explanation

Answer: (c) 20736

Explanation:
1. Each term is 12 times the previous one: 120, 121, 122, 123.
2. ? = 1728 × 12 = 20736 = 124.

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

Question 8: What should come in place of the question mark (?) in the following number series?
8, 4.5, 5.5, 13, 56, ?
(a) 566
(b) 496
(c) 596
(d) 450
(e) 456
Show Answer & Explanation

Answer: (e) 456

Explanation:
1. 8 × 0.5 + 0.5 = 4.5, 4.5 × 1 + 1 = 5.5, 5.5 × 2 + 2 = 13, 13 × 4 + 4 = 56.
2. The multiplier and the number added are equal and double each time.
3. ? = 56 × 8 + 8 = 456.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 9: What should come in place of the question mark (?) in the following number series?
11, 14, 23, 50, ?
(a) 111
(b) 121
(c) 151
(d) 131
(e) 141
Show Answer & Explanation

Answer: (d) 131

Explanation:
1. Differences: 3, 9, 27 - powers of 3.
2. Next difference = 81.
3. ? = 50 + 81 = 131.

Teacher's Note:
1. First write the differences between consecutive terms; if they are not constant, take differences again or compare them with squares, cubes or powers of 2 and 3.
2. When a series grows by roughly the same factor each time, test multiply-and-add rules such as x × 2 + 1 before trying differences.

Question 10: What should come in place of the question mark (?) in the following number series?
19, 25, 42, 71, 113, ?
(a) 169
(b) 153
(c) 186
(d) 196
(e) 269
Show Answer & Explanation

Answer: (a) 169

Explanation:
1. Differences: 6, 17, 29, 42.
2. Second differences: 11, 12, 13, so the next is 14 and the next difference is 42 + 14 = 56.
3. ? = 113 + 56 = 169.

Teacher's Note:
1. First write the differences between consecutive terms; if they are not constant, take differences again or compare them with squares, cubes or powers of 2 and 3.
2. When a series grows by roughly the same factor each time, test multiply-and-add rules such as x × 2 + 1 before trying differences.

Question 11: What should come in place of the question mark (?) in the following number series?
21, 35, 30, 44, 39, ?
(a) 59
(b) 53
(c) 55
(d) 45
(e) 46
Show Answer & Explanation

Answer: (b) 53

Explanation:
1. The series alternately adds 14 and subtracts 5.
2. 21 + 14 = 35, 35 - 5 = 30, 30 + 14 = 44, 44 - 5 = 39.
3. ? = 39 + 14 = 53.

Teacher's Note:
1. When the terms go up and down alternately, split the series into odd-position and even-position terms and study each part separately.
2. Two interleaved simple series (one adding, one multiplying, for example) are a favourite trick in reasoning papers.

Question 12: What should come in place of the question mark (?) in the following number series?
7, 14, 30, 56, 93, ?
(a) 142
(b) 403
(c) 124
(d) 96
(e) 124
Show Answer & Explanation

Answer: (a) 142

Explanation:
1. Differences: 7, 16, 26, 37.
2. Second differences: 9, 10, 11, so the next is 12 and the next difference is 49.
3. ? = 93 + 49 = 142.

Teacher's Note:
1. First write the differences between consecutive terms; if they are not constant, take differences again or compare them with squares, cubes or powers of 2 and 3.
2. When a series grows by roughly the same factor each time, test multiply-and-add rules such as x × 2 + 1 before trying differences.

Question 13: What should come in place of the question mark (?) in the following number series?
23, 39, 32, 48, 41, ?
(a) 58
(b) 57
(c) 59
(d) 48
(e) 84
Show Answer & Explanation

Answer: (b) 57

Explanation:
1. The series alternately adds 16 and subtracts 7.
2. 23 + 16 = 39, 39 - 7 = 32, 32 + 16 = 48, 48 - 7 = 41.
3. ? = 41 + 16 = 57.

Teacher's Note:
1. When the terms go up and down alternately, split the series into odd-position and even-position terms and study each part separately.
2. Two interleaved simple series (one adding, one multiplying, for example) are a favourite trick in reasoning papers.

Question 14: What should come in place of the question mark (?) in the following number series?
11, 13, 20, 48, 111, ?
(a) 237
(b) 125
(c) 273
(d) 255
(e) 555
Show Answer & Explanation

Answer: (a) 237

Explanation:
1. Differences: 2, 7, 28, 63.
2. These are 13 + 1, 23 - 1, 33 + 1, 43 - 1, so the next is 53 + 1 = 126.
3. ? = 111 + 126 = 237.

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

Question 15: What should come in place of the question mark (?) in the following number series?
13, 17, 33, 97, ?, 1377
(a) 259
(b) 563
(c) 535
(d) 455
(e) 353
Show Answer & Explanation

Answer: (e) 353

Explanation:
1. Differences: 4, 16, 64 - powers of 4.
2. ? = 97 + 256 = 353.
3. Check: 353 + 1024 = 1377.

Teacher's Note:
1. First write the differences between consecutive terms; if they are not constant, take differences again or compare them with squares, cubes or powers of 2 and 3.
2. When a series grows by roughly the same factor each time, test multiply-and-add rules such as x × 2 + 1 before trying differences.

Question 16: What should come in place of the question mark (?) in the following number series?
6, 3.5, 4.5, 11, 48, ?
(a) 96
(b) 56
(c) 392
(d) 192
(e) 292
Show Answer & Explanation

Answer: (c) 392

Explanation:
1. 6 × 0.5 + 0.5 = 3.5, 3.5 × 1 + 1 = 4.5, 4.5 × 2 + 2 = 11, 11 × 4 + 4 = 48.
2. Multiplier and added number double each step.
3. ? = 48 × 8 + 8 = 392.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 17: What should come in place of the question mark (?) in the following number series?
6, 16, 45, 184, 917, ?
(a) 5056
(b) 5506
(c) 5006
(d) 5060
(e) 6050
Show Answer & Explanation

Answer: (b) 5506

Explanation:
1. 6 × 2 + 4 = 16, 16 × 3 - 3 = 45, 45 × 4 + 4 = 184, 184 × 5 - 3 = 917.
2. The multiplier rises by 1; +4 and -3 alternate.
3. ? = 917 × 6 + 4 = 5506.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 18: What should come in place of the question mark (?) in the following number series?
11, 20, 38, 74, ?
(a) 85
(b) 96
(c) 100
(d) 136
(e) 146
Show Answer & Explanation

Answer: (e) 146

Explanation:
1. Each term = previous × 2 - 2.
2. 11 × 2 - 2 = 20, 20 × 2 - 2 = 38, 38 × 2 - 2 = 74.
3. ? = 74 × 2 - 2 = 146.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 19: What should come in place of the question mark (?) in the following number series?
15, 21, 38, 65, 101, ?
(a) 150
(b) 120
(c) 125
(d) 145
(e) 154
Show Answer & Explanation

Answer: (d) 145

Explanation:
1. Differences: 6, 17, 27, 36.
2. Second differences: 11, 10, 9, so the next is 8 and the next difference is 44.
3. ? = 101 + 44 = 145.

Teacher's Note:
1. First write the differences between consecutive terms; if they are not constant, take differences again or compare them with squares, cubes or powers of 2 and 3.
2. When a series grows by roughly the same factor each time, test multiply-and-add rules such as x × 2 + 1 before trying differences.

Question 20: What should come in place of the question mark (?) in the following number series?
24, 28, 19, 35, 10, ?
(a) 45
(b) 44
(c) 46
(d) 42
(e) 47
Show Answer & Explanation

Answer: (c) 46

Explanation:
1. 24 + 22 = 28, 28 - 32 = 19, 19 + 42 = 35, 35 - 52 = 10.
2. Squares of 2, 3, 4, 5, 6 are added and subtracted alternately.
3. ? = 10 + 62 = 46.

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

Question 21: What should come in place of the question mark (?) in the following number series?
14, 6, 4, 4, 8, ?
(a) 32
(b) 8
(c) 4
(d) 16
(e) 14
Show Answer & Explanation

Answer: (a) 32

Explanation:
1. 14 × 1 - 8 = 6, 6 × 2 - 8 = 4, 4 × 3 - 8 = 4, 4 × 4 - 8 = 8.
2. The multiplier rises by 1 and 8 is always subtracted.
3. ? = 8 × 5 - 8 = 32.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 22: What should come in place of the question mark (?) in the following number series?
14, 25, 47, 91, ?, 355
(a) 100
(b) 197
(c) 179
(d) 335
(e) 155
Show Answer & Explanation

Answer: (c) 179

Explanation:
1. Each term = previous × 2 - 3.
2. 14 × 2 - 3 = 25, 25 × 2 - 3 = 47, 47 × 2 - 3 = 91.
3. ? = 91 × 2 - 3 = 179; check: 179 × 2 - 3 = 355.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 23: What should come in place of the question mark (?) in the following number series?
11, 24, 44, 70, 101, ?
(a) 136
(b) 102
(c) 80
(d) 102
(e) 163
Show Answer & Explanation

Answer: (a) 136

Explanation:
1. Differences: 13, 20, 26, 31.
2. Second differences: 7, 6, 5, so the next is 4 and the next difference is 35.
3. ? = 101 + 35 = 136.

Teacher's Note:
1. First write the differences between consecutive terms; if they are not constant, take differences again or compare them with squares, cubes or powers of 2 and 3.
2. When a series grows by roughly the same factor each time, test multiply-and-add rules such as x × 2 + 1 before trying differences.

Question 24: What should come in place of the question mark (?) in the following number series?
18, 8, 6, 8, 24, ?
(a) 6
(b) 48
(c) 24
(d) 176
(e) 167
Show Answer & Explanation

Answer: (d) 176

Explanation:
1. 18 × 0.5 - 1 = 8, 8 × 1 - 2 = 6, 6 × 2 - 4 = 8, 8 × 4 - 8 = 24.
2. The multiplier and the number subtracted both double each step.
3. ? = 24 × 8 - 16 = 176.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 25: What should come in place of the question mark (?) in the following number series?
28, 32, 23, 39, 14, ?
(a) 30
(b) 50
(c) 55
(d) 6
(e) 14
Show Answer & Explanation

Answer: (b) 50

Explanation:
1. 28 + 22 = 32, 32 - 32 = 23, 23 + 42 = 39, 39 - 52 = 14.
2. Squares of 2, 3, 4, 5, 6 are added and subtracted alternately.
3. ? = 14 + 36 = 50.

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

Question 26: What should come in place of the question mark (?) in the following number series?
5, 12, 33, 136, 675, ?
(a) 5569
(b) 4426
(c) 5046
(d) 4065
(e) 4056
Show Answer & Explanation

Answer: (e) 4056

Explanation:
1. 5 × 2 + 2 = 12, 12 × 3 - 3 = 33, 33 × 4 + 4 = 136, 136 × 5 - 5 = 675.
2. Multiply by n and add or subtract n alternately (n = 2, 3, 4, ...).
3. ? = 675 × 6 + 6 = 4056.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 27: What should come in place of the question mark (?) in the following number series?
2, 5, 9, 19, 37, ?
(a) 76
(b) 74
(c) 75
(d) 73
(e) None of these
Show Answer & Explanation

Answer: (c) 75

Explanation:
1. 2 × 2 + 1 = 5, 5 × 2 - 1 = 9, 9 × 2 + 1 = 19, 19 × 2 - 1 = 37.
2. Double and alternately add 1 and subtract 1.
3. ? = 37 × 2 + 1 = 75.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 28: What should come in place of the question mark (?) in the following number series?
4, -8, 16, -32, 64, ?
(a) 128
(b) -128
(c) 192
(d) -192
(e) None of these
Show Answer & Explanation

Answer: (b) -128

Explanation:
1. Each term = previous × (-2).
2. 64 × (-2) = -128.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 29: In the following number series only one number is wrong. Find out the wrong number.
2, 9, 28, 65, 126, 216, 344
(a) 2
(b) 28
(c) 65
(d) 126
(e) 216
Show Answer & Explanation

Answer: (e) 216

Explanation:
1. Each term = n3 + 1: 1 + 1 = 2, 8 + 1 = 9, 27 + 1 = 28, 64 + 1 = 65, 125 + 1 = 126.
2. The 6th term should be 63 + 1 = 217, and 73 + 1 = 344 fits.
3. So 216 is wrong.

Teacher's Note:
1. In a wrong-number question, find the rule using the terms at the start and the end of the series, then recompute each term to spot the odd one.
2. Only one term breaks the rule, so a rule that fails at two places is the wrong rule; try another pattern.

Question 30: In the following number series only one number is wrong. Find out the wrong number.
10, 26, 74, 218, 654, 1946, 5834
(a) 26
(b) 74
(c) 218
(d) 654
(e) 1946
Show Answer & Explanation

Answer: (d) 654

Explanation:
1. Each term = previous × 3 - 4: 10 × 3 - 4 = 26, 26 × 3 - 4 = 74, 74 × 3 - 4 = 218.
2. 218 × 3 - 4 = 650, not 654; and 650 × 3 - 4 = 1946, 1946 × 3 - 4 = 5834.
3. So 654 is wrong.

Teacher's Note:
1. In a wrong-number question, find the rule using the terms at the start and the end of the series, then recompute each term to spot the odd one.
2. Only one term breaks the rule, so a rule that fails at two places is the wrong rule; try another pattern.

Question 31: What should come in place of the question mark (?) in the following number series?
59.76, 58.66, 56.46, 52.06, ?, 25.66
(a) 48.08
(b) 46.53
(c) 43.46
(d) 43.26
(e) None of these
Show Answer & Explanation

Answer: (d) 43.26

Explanation:
1. Differences: 1.1, 2.2, 4.4 - each double the last.
2. Next difference = 8.8, so ? = 52.06 - 8.8 = 43.26.
3. Check: 43.26 - 17.6 = 25.66.

Teacher's Note:
1. First write the differences between consecutive terms; if they are not constant, take differences again or compare them with squares, cubes or powers of 2 and 3.
2. When a series grows by roughly the same factor each time, test multiply-and-add rules such as x × 2 + 1 before trying differences.

Question 32: What should come in place of the question mark (?) in the following number series?
36, 157, 301, 470, ?, 891
(a) 646
(b) 695
(c) 639
(d) 669
(e) None of these
Show Answer & Explanation

Answer: (e) None of these

Explanation:
1. Differences: 121, 144, 169 = 112, 122, 132.
2. ? = 470 + 142 = 470 + 196 = 666; check: 666 + 152 = 891.
3. 666 is not in options (a) to (d).

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

Question 33: What should come in place of the question mark (?) in the following number series?
14, 70, 350, ?, 8750, 43750
(a) 1570
(b) 875
(c) 1750
(d) 785
(e) None of these
Show Answer & Explanation

Answer: (c) 1750

Explanation:
1. Each term is 5 times the previous one.
2. ? = 350 × 5 = 1750; check: 1750 × 5 = 8750.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 34: What should come in place of the question mark (?) in the following number series?
13, 13, 65, 585, 7605, 129285, ?
(a) 2456415
(b) 2235675
(c) 2980565
(d) 2714985
(e) 2197845
Show Answer & Explanation

Answer: (d) 2714985

Explanation:
1. Multipliers: ×1, ×5, ×9, ×13, ×17 - they rise by 4.
2. Next multiplier = 21.
3. ? = 129285 × 21 = 2714985.

Teacher's Note:
1. If each term is roughly a fixed multiple of the previous one, divide neighbouring terms to find the multiplier, then check what is added or subtracted.
2. Multipliers that rise by 1 (×1, ×2, ×3 ...) or halve/double each step are very common in bank and SSC exam series.

Question 35: What should come in place of the question mark (?) in the following number series?
1, 16, 81, 256, 625, 1296, ?
(a) 4096
(b) 2401
(c) 1764
(d) 3136
(e) 6561
Show Answer & Explanation

Answer: (b) 2401

Explanation:
1. The terms are 14, 24, 34, 44, 54, 64.
2. ? = 74 = 2401.

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

Question 36: What should come in place of the question mark (?) in the following number series?
1, 7, 49, 343, ?
(a) 16807
(b) 1227
(c) 2058
(d) 2401
(e) None of these
Show Answer & Explanation

Answer: (d) 2401

Explanation:
1. Powers of 7: 70, 71, 72, 73.
2. ? = 343 × 7 = 74 = 2401.

Teacher's Note:
1. Learn squares up to 30 and cubes up to 15 by heart; many series are just n2, n3 or n4 with a small change.
2. If the terms are large and do not grow evenly, check whether they are powers such as 72, 63, 54.

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Download Chapter MCQs: General Aptitude Arithmetic Ability Number Series

About Number Series MCQs for General Aptitude Arithmetic Ability

Review structured objective questions for General Aptitude Arithmetic Ability Number Series. Built according to official Aptitude guidelines, these MCQ sets support daily revision and core concept reinforcement.

How to Verify Your MCQ Answers

Cross-reference your completed choices with comprehensive NCERT solutions for General Aptitude Arithmetic Ability to ensure absolute clarity across all sub-topics in this chapter.

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FAQs

Where can I access latest Number Series Aptitude MCQ Questions with Answers Set 04?

You can get most exhaustive Number Series Aptitude MCQ Questions with Answers Set 04 for free on StudiesToday.com. These MCQs for General Aptitude Arithmetic Ability are updated for the 2026-27 academic session as per Aptitude examination standards.

Are Assertion-Reasoning and Case-Study MCQs included in the Arithmetic Ability General Aptitude material?

Yes, our Number Series Aptitude MCQ Questions with Answers Set 04 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the Aptitude paper is now competency-based.

How do practicing Arithmetic Ability MCQs help in scoring full marks in General Aptitude exams?

By solving our Number Series Aptitude MCQ Questions with Answers Set 04, General Aptitude students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Arithmetic Ability.

Do you provide answers and explanations for Number Series Aptitude MCQ Questions with Answers Set 04?

Yes, Arithmetic Ability MCQs for General Aptitude have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused Aptitude exams.

Can I practice these Arithmetic Ability General Aptitude MCQs online?

Yes, you can also access online interactive tests for Number Series Aptitude MCQ Questions with Answers Set 04 on StudiesToday.com as they provide instant answers and score to help you track your progress in Arithmetic Ability.