SSC CGL Missing Number Questions with Detailed Solutions

Get SSC CGL Missing Number Questions to prepare for your upcoming exam. Solve the most expected questions and detailed solutions that can be asked in the exam.

Important SSC CGL Missing Number Questions

Q1.

Which number will replace the question mark (?) in the following series?
13, 14, 14, 16, ? , 35

  • A.

    18

  • B.

    26

  • C.

    28

  • D.

    32

    ✓ Correct

Answer & Solution

Correct option is D

Information Given:
Series: 13, 14, 14, 16, ?, 35
Logic:
Alternate operations: +1, ×1, +2, ×2, +3
Explanation:
Logic: Apply addition and multiplication alternately.
13 + 1 = 14
14 × 1 = 14
14 + 2 = 16
16 × 2 = 32
32 + 3 = 35
Final Answer:
32
Final Correct Option:
(D) 32
Q2.

Which number will replace the question mark (?) in the following series?
19, 23, 34, 64, ?

  • A.

    131

    ✓ Correct
  • B.

    129

  • C.

    130

  • D.

    128

Answer & Solution

Correct option is A

Information Given:
Series: 19, 23, 34, 64, ?
Logic:
Differences follow: 1³ + 3, 2³ + 3, 3³ + 3, 4³ + 3.
Explanation:
19 + (1³ + 3) = 19 + 4 = 23
23 + (2³ + 3) = 23 + 11 = 34
34 + (3³ + 3) = 34 + 30 = 64
64 + (4³ + 3) = 64 + 67 = 131
Final Answer:
131
Final Correct Option:
(A) 131
Q3.

Directions: Select the correct options from the given alternatives
3110, 3151, 3192, 3233, ?

  • A.

    3272

  • B.

    3274

    ✓ Correct
  • C.

    3276

  • D.

    3270

Answer & Solution

Correct option is B

Given
Series: 3110, 3151, 3192, 3233, ?

Formula Used
Common difference = 41

Solution
Calculate the difference between successive terms:
3151 - 3110 = 41
3192 - 3151 = 41
3233 - 3192 = 41

Apply the common difference to find the next term:
? = 3233 + 41 = 3274

Final Answer
So the correct answer is (b)

Q4.

Find the next element that replace the ? Logically
10, 28, 64, 136, ?

  • A.

    274

  • B.

    289

  • C.

    295

  • D.

    280

    ✓ Correct

Answer & Solution

Correct option is D

Given
Series: 10, 28, 64, 136, ?

Formula Used: × 2 + 8

Solution
Checking the relation between consecutive terms:
10 × 2 + 8 = 28
28 × 2 + 8 = 64
64 × 2 + 8 = 136

Following the same pattern:
136 × 2 + 8 = 272 + 8 = 280

Final Answer
So the correct answer is (d)

Q5.

What comes next in the series: 
100, 50, 25, 12.5,?

  • A.

    25

  • B.

    6.25

    ✓ Correct
  • C.

    5

  • D.

    10

Answer & Solution

Correct option is B

Given
Series: 100, 50, 25, 12.5, ?

Formula Used: Each successive term is obtained by dividing the previous term by 2:
100 ÷ 2 = 50
50 ÷ 2 = 25
25 ÷ 2 = 12.5

For the next term:
12.5 ÷ 2 = 6.25

Final Answer
So the correct answer is (b)
Q6.

Directions: Pick the correct options from below.
24, 215, 48, 511, ?

  • A.

    343

  • B.

    80

    ✓ Correct
  • C.

    95

  • D.

    125

Answer & Solution

Correct option is B

Information Given:
Series: 24, 215, 48, 511, ?
Formula Used:
Odd positions: n² − 1
Even positions: n³ − 1
Logic:
Bases increase consecutively: 5, 6, 7, 8, 9.
Operations alternate: square − 1, cube − 1.
Explanation:
Position 1: 5² − 1 = 24
Position 2: 6³ − 1 = 215
Position 3: 7² − 1 = 48
Position 4: 8³ − 1 = 511
Position 5: 9² − 1 = 80
Short Trick:
Bases go 5, 6, 7, 8, 9; alternate square/cube, then subtract 1.
Final Answer:
80
Final Correct Option:
(B) 80
Q7.

Find the next element that replaces the ? Logically.
90, 109, 130, 153, ?

  • A.

    185

  • B.

    193

  • C.

    174

  • D.

    178

    ✓ Correct

Answer & Solution

Correct option is D

Given
Series: 90, 109, 130, 153, ?

Formula Used
Difference between consecutive terms follows an arithmetic progression with a common difference of 2.

Solution
109 - 90 = 19
130 - 109 = 21
153 - 130 = 23

The differences are 19, 21, 23 (increasing by 2).
Next difference = 23 + 2 = 25

Next term = 153 + 25 = 178

Final Answer
So the correct answer is (d)

Q8.

Find the next element that replaces the ? Logically.
30, 41, 54, 69, ?

  • A.

    96

  • B.

    103

  • C.

    86

    ✓ Correct
  • D.

    84

Answer & Solution

Correct option is C

Given
Series: 30, 41, 54, 69, ?

Formula Used
Difference between consecutive terms increases by 2.

Solution
41 - 30 = 11
54 - 41 = 13
69 - 54 = 15

The sequence of differences is 11, 13, 15.
Next difference = 15 + 2 = 17

Missing number = 69 + 17 = 86

Final Answer
So the correct answer is (c)

Q9.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
855, ?, 879, 891, 903, 915, 927, 939

  • A.

    867

    ✓ Correct
  • B.

    866

  • C.

    869

  • D.

    870

Answer & Solution

Correct option is A

Given
The given number series is:
855, ?, 879, 891, 903, 915, 927, 939

Logic:

Each term increases by 12.

Solution
Find the difference between consecutive known terms:
939 - 927 = 12
927 - 915 = 12
915 - 903 = 12
903 - 891 = 12
891 - 879 = 12

The common difference throughout the series is 12.
Therefore, the missing term is:
855 + 12 = 867

Verifying with the next term:
867 + 12 = 879 (Satisfied)
Final Answer
So the correct answer is (a)

Q10.

A series is given with one term wrong. Select the wrong term from the given alternatives.
-419, -430, -442, -455, -468, -484, -500, -517

  • A.

    -468

    ✓ Correct
  • B.

    -430

  • C.

    -419

  • D.

    -500

Answer & Solution

Correct option is A

Given
Series: -419, -430, -442, -455, -468, -484, -500, -517

Formula Used
Difference between consecutive terms: Difference increases or decreases by a constant value.

Find the differences between consecutive terms:
-419 → -430 = −11
-430 → -442 = −12
-442 → -455 = −13
-455 → -468 = −13 ❌
-468 → -484 = −16
-484 → -500 = −16
-500 → -517 = −17
The intended pattern is:
−11, −12, −13, −14, −15, −16, −17
So after −455, the next term should be:
−455 − 14 = −469
But the series gives −468.
Answer: A — -468​​
Q11.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
-438, -435, -429, ?, -408, -393, -375, -354

  • A.

    -417

  • B.

    -419

  • C.

    -420

    ✓ Correct
  • D.

    -416

Answer & Solution

Correct option is C

Given
Series: -438, -435, -429, ?, -408, -393, -375, -354

Formula Used
Difference between consecutive terms forms an increasing arithmetic pattern.

Solution
Let us find the differences between consecutive terms:
-435 - (-438) = +3
-429 - (-435) = +6

The differences are consecutive multiples of 3: +3, +6, +9, +12, +15, +18, +21...

Therefore, the missing term is:
-429 + 9 = -420

Verifying the next term:
-420 + 12 = -408
-408 + 15 = -393
-393 + 18 = -375
-375 + 21 = -354

Final Answer
So the correct answer is (c) -420

Q12.

Directions: Select the correct options from the given alternatives
100, 91, 79, 64 ____

  • A.

    45

  • B.

    46

    ✓ Correct
  • C.

    56

  • D.

    42

Answer & Solution

Correct option is B

Given
Series = 100, 91, 79, 64, ____

Formula Used
Difference of successive terms in a decreasing sequence.

Solution
Find the difference between consecutive terms:
100 - 91 = 9
91 - 79 = 12
79 - 64 = 15
The differences being subtracted are multiples of 3: 9, 12, 15...
The next difference to subtract is 15 + 3 = 18.
Next term = 64 - 18 = 46

Final Answer
So the correct answer is (b)

Q13.

Which number will replace the question mark (?) in the following series?
37, 38, 38, 40, ?, 83

  • A.

    56

  • B.

    70

  • C.

    76

  • D.

    80

    ✓ Correct

Answer & Solution

Correct option is D

Information Given:
Series: 37, 38, 38, 40, ?, 83
Logic:
Pattern alternates: +1, ×1, +2, ×2, +3.
Explanation:
37 + 1 = 38 → 38 × 1 = 38 → 38 + 2 = 40 → 40 × 2 = 80 → 80 + 3 = 83.
Final Answer:
80
Final Correct Option:
(D) 80
Q14.

Which number will replace the question mark (?) in the following series?
61, 65, 76, 106, ?

  • A.

    171

  • B.

    172

  • C.

    173

    ✓ Correct
  • D.

    174

Answer & Solution

Correct option is C

Information Given:
Series: 61, 65, 76, 106, ?
Logic: Differences: +4, +11, +30 → each = n³ + 3.
Explanation:
1³ + 3 = 4 → 61 + 4 = 65
2³ + 3 = 11 → 65 + 11 = 76
3³ + 3 = 30 → 76 + 30 = 106
4³ + 3 = 67 → 106 + 67 = 173
Final Answer:
173
Final Correct Option:
C) 173
Q15.

Which number will replace the question mark (?) in the following series?
86, 98, 127, 179, 261,?

  • A.

    381

    ✓ Correct
  • B.

    382

  • C.

    383

  • D.

    384

Answer & Solution

Correct option is A

Series:
86, 98, 127, 179, 261, ?
Find the differences:
98 − 86 = 12
127 − 98 = 29
179 − 127 = 52
261 − 179 = 82
Now look at the differences:
12, 29, 52, 82
The differences between these are:
29 − 12 = 17
52 − 29 = 23
82 − 52 = 30
These increase by:
+6, +7, so the next increase is +8.
Therefore:
30 + 8 = 38
Next difference:
82 + 38 = 120
So,
261 + 120 = 381
Correct Answer: A) 381

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