Insert the Missing Character PYQs for UPSC (2011-2024) | Solved Questions & PDF Download

Master Insert the Missing Character for UPSC with solved Previous Year Questions (PYQs) from 2011 to 2024. This page provides detailed solutions, practice questions, and a free downloadable PDF to help you ace your UPSC preparation.

Why Insert the Missing Character Matters in UPSC?

Insert the Missing Character questions are a crucial part of the UPSC CSAT (Civil Services Aptitude Test). They test your ability to:

➡️ Identify patterns and logical sequences.
➡️ Solve complex puzzles and number/letter-based problems.
➡️ Enhance your logical reasoning and analytical skills.

This page breaks down the concepts and provides year-wise solved questions to help you master this topic.

Key Concepts in Insert the Missing Character

Before diving into the questions, let’s quickly revise the key concepts:

1. Number-Based Patterns

➡️ Identify patterns like arithmetic progression, geometric progression, or prime numbers.
➡️ Example: 2, 4, 6, 8, ? (Answer: 10)

2. Letter-Based Patterns

➡️ Identify patterns like alphabetical order, reverse order, or skipping letters.
➡️ Example: A, C, E, G, ? (Answer: I)

3. Mixed Patterns

➡️ Combine numbers and letters to form complex patterns.
➡️ Example: A1, B2, C3, D4, ? (Answer: E5)

Year-Wise Insert the Missing Character PYQs (2011-2024)

Q1. Consider the following figures: [CSAT 2011]

What is the missing number?

(a) 7

(b) 8

(d) 10

Solution:

From 1st diagram logical inference can be made:

2 x 3 = 6, 6 x 4 = 24 and 2 x 40 = 80

Similarly second diagram

3 x 40 = 120, 3 x 3 = 9, 9 x 4 = 36

Hence option (c) is correct

Q2. Examine the following three figures in which the numbers follow a specific pattern:

The missing number (?) in the third figure above is [CSAT 2013]

(a) 7

(b) 16

(d) 28

Solution:

From 1st diagram logical inference can be made:

(14 x 12)/2 = 84

From 2nd diagram

(18 x 9)/2 = 81

Similarly,

Third diagram

(11 x a)/2 = 88

11 x a = 176

a = 16

Hence option (b) is correct

Q3. Consider the following matrix:

3	370	7
2	224	6
1	730	X

What is the number at ‘X’ in the above matrix? [CSAT 2013]

(a) 5

(b) 8

(d) 11

Solution:

From 1st row logical inference can be made:

3³ + 7³ = 370

2nd row = 2³ + 6³ = 8 + 216 = 224

3rd row = 1³ + X³ = 730

X = 9

Hence option (c) is correct

Q4. Consider the table given below in which the numbers bear certain relationship among themselves along the rows:

[CSAT 2014]

Which one of the following numbers is the missing number indicated above by X?

(a) 19

(b) 15

(d) 8

Solution:

From 1st row logical inference can be made:

29 - 13 + 2 = 18

3rd row:

30 - 27 + 0 = 3

2nd row

33 - 15 + 1 = 19

Hence option (b) is correct

Q5. Consider the following matrix: [CSAT 2015]

3	8	10	2	?	1
6	56	90	2	20	0

What is the missing number at "?" in the matrix?

(a) 5

(b) 0

(d) 3

Solution:

From given table logical inference can be made

In each column the number in the second Row is the product of the number in the first row and its predecessor.

3 x 2 = 6, 8 x 7 = 56, 10 x 9 = 90, 2 x 1 = 2, 1 x 0 = 0

So, 4 x 5 = 20

Hence option (a) is correct

Q6. Consider the following pattern of numbers: [CSAT 2018]

8 10 15 13

6 5 7 4

4 6 8 8

_ _ _ _

6 11 16 ?

What is the number at? in the above pattern?

(a) 17

(b) 19

(d) 23

Solution:

From given table logical inference can be made

C1 = 8 - 6 + 4 = 6

C2 = 10 - 5 + 6 = 11

C3 = 15 - 7 + 8 = 16

C4 = 13 - 4 + 8 = 17

Hence option (a) is correct

Q7. You are given two identical sequences in two rows: [CSAT 2021]

Sequence-I	8	4	6	15	52.5	236.25
Sequence-II	5	A	B	C	D	E

What is the entry in the place of C for the Sequence-II?

(a) 2.5

(b) 5

(d) 32.8125

Solution:

From given table logical inference can be made

Sequence 1:

8 x (1/2) = 4

8 x (1/2) x (3/2) = 6

8 x (1/2) x (3/2) x (5/2) = 15

Thus similar pattern is followed for sequence 2

5 x (1/2) = 2.5

5 x (1/2) x (3/2) = 3.75

5 x (1/2) x (3/2) x (5/2) = 9.375 = C

Hence option (c) is correct

Q8. Following is a matrix of certain entries. The entries follow a certain trend row-wise. Choose the missing entry (?) accordingly. [CSAT 2021]

7B	10A	3C
3C	9B	6A
10A	13C	?

(a) 9B

(b) 3A

(d) 3C

Solution:

From given table logical inference can be made

Row 1

10 A - 7B = 3C

9B - 3C = 6A

13C - 10A = 3B

Hence option (c) is correct

Q9. If 7*9*10 = 8, 9* 11* 30 = 5, 11*17*21=13, what is the value of 23*4*15? [CSAT 2023]

(a) 6

(b) 8

(d) 15

Solution:

From given table logical inference can be made

7 + 9 + 10 = 26

2 + 6 = 8

Second

9 + 11 + 30 = 50 = 5 + 0 = 5

So value of 23*4*15

23 + 4 + 15 = 42 = 4 + 2 = 6

Hence option (a) is correct

ANSWER KEY

1. C

2. B

3. C

4. B

5. A

6. A

7. C

8. C

9. A

Download Insert the Missing Character PYQs PDF

➡️ Download the complete set of Insert the Missing Character PYQs (2011-2024) with solutions in PDF format.
➡️ Click Here to Download PDF

FAQs on Insert the Missing Character for UPSC

1. Is Insert the Missing Character important for UPSC?

➡️ Yes, Insert the Missing Character is a crucial topic for the UPSC CSAT paper. It tests your logical reasoning and pattern recognition skills.

2. How to prepare for Insert the Missing Character in UPSC?

➡️ Understand basic concepts like number and letter patterns.
➡️ Practice PYQs regularly.
➡️ Use reliable resources like NCERT books and online platforms like iassetu.com.

3. What are the most frequently asked Insert the Missing Character questions in UPSC?

➡️ Number-based patterns (arithmetic, geometric, etc.)
➡️ Letter-based patterns (alphabetical, reverse, etc.)
➡️ Mixed patterns (combining numbers and letters)

Conclusion

Practicing Insert the Missing Character PYQs is essential for cracking the UPSC CSAT paper. This page provides year-wise solved questions, practice problems, and a free PDF download to help you prepare effectively. Bookmark this page and revisit it regularly for updates.

For more UPSC preparation resources, explore iassetu.com. Happy learning!