Missing Number Reasoning | SSC UPPSC UPSSSC SSC MTS SSC CGL Missing Number Problems PDF Download 50 Most Important Q

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Types of Missing Number Reasoning Problems

1) Geometrical shape-based missing numbers
2) Matrix-based Missing Number

Approach to Solve the Missing Number Reasoning Questions

First, check the order of the missing numbers. The order of the missing numbers problem is either in ascending order or in descending order and then determine the difference between the numbers upto the missing number placed next to each other to calculate the missing number or we can find the missing numbers by determining the pattern followed by the numbers/letters in the given series or figures. This pattern can be any of the mathematical operations like addition, subtraction, multiplication or a combination of different operations.

Now let’s understand the types of missing number reasoning in detail –

1) Geometrical Shape-Based Missing Numbers

– In this type of questions, different geometrical figures will be given which will have numbers/letters inside them following a certain rule/logic or sequence. The question of missing number in geometric shape may contain a single figure or a combination of more than one figures. You have to find the logic or trick from the given terms upto missing number to find the missing term. Some figures along with logic are explained below.

2) Matrix-Based Missing Numbers

-In the matrix type of questions, a matrix will be given with columns, rows having letters or numbers or both inside them following a certain logic and sequence. You have to find that missing number or latter or both with logic among the given terms to find the missing term. Some matrices with logic are given below.

3. Missing Number in Series

1. Find the missing number: 2, 6, 12, 20, ?
   a) 28
   b) 30
   c) 32
   d) 36
   Answer: b) 30
2. What comes next in the sequence? 3, 9, 27, 81, ?
   a) 162
   b) 243
   c) 324
   d) 729
   Answer: b) 243
3. Complete the series: 5, 8, 12, 17, ?
   a) 21
   b) 22
   c) 23
   d) 24
   Answer: b) 22
4. Identify the missing term: 50, 40, 30, ?, 10
   a) 15
   b) 20
   c) 25
   d) 35
   Answer: b) 20
5. Fill in the blank: 144, 121, 100, 81, ?
   a) 60
   b) 49
   c) 64
   d) 36
   Answer: c) 64

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4. Missing Number in Patterns

6. Find the missing number:
   6, 12, 18, ?, 36
   a) 22
   b) 24
   c) 26
   d) 28
   Answer: b) 24
7. Identify the missing number:
   2, 4, 8, 16, ?
   a) 32
   b) 40
   c) 48
   d) 64
   Answer: a) 32
8. Complete the sequence:
   11, 13, 17, 19, ?
   a) 21
   b) 23
   c) 25
   d) 27
   Answer: b) 23
9. Find the missing value:
   1, 1, 2, 3, 5, 8, ?
   a) 12
   b) 13
   c) 14
   d) 15
   Answer: b) 13
10. Fill in the blank:
    5, 10, 20, 40, ?
    a) 60
    b) 80
    c) 100
    d) 120
    Answer: b) 80

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5. Number Matrix Missing Term

11. Find the missing number:
    

    2	4	6
    8	?	12
    14	16	18

    a) 10
    b) 9
    c) 11
    d) 12
    Answer: a) 10

12. Complete the grid:
    

    3	6	9
    12	?	18
    21	24	27

    a) 15
    b) 16
    c) 17
    d) 18
    Answer: a) 15

13. Fill in the blank:
    

    10	20	30
    40	?	60
    70	80	90

    a) 45
    b) 50
    c) 55
    d) 60
    Answer: b) 50

14. Identify the missing value:
    

    1	2	3
    4	5	?
    7	8	9

    a) 6
    b) 7
    c) 8
    d) 10
    Answer: a) 6

15. Complete the matrix:
    

    2	3	5
    7	11	?
    17	19	23

    a) 12
    b) 13
    c) 15
    d) 18
    Answer: b) 13

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6. Logical Patterns

16. Find the missing number: 1, 4, 9, 16, ?
    a) 20
    b) 24
    c) 25
    d) 36
    Answer: c) 25
17. Complete the sequence: 81, 64, 49, 36, ?
    a) 16
    b) 25
    c) 20
    d) 24
    Answer: b) 25
18. Identify the missing term: 3, 6, 9, 15, ?
    a) 18
    b) 21
    c) 24
    d) 27
    Answer: b) 21
19. Fill in the blank: 2, 6, 12, 20, ?
    a) 25
    b) 28
    c) 30
    d) 32
    Answer: c) 30
20. What comes next? 4, 7, 11, 16, ?
    a) 20
    b) 21
    c) 22
    d) 23
    Answer: a) 21

Missing Number in Patterns