Current Affairs 3rd Class

Category : 3rd Class

Inserting Missing Number

Learning Objectives

• To get aware of Missing Number.
• Increasing interest about this segment of reasoning.
• Improving the general awareness.
• Increasing the word power.

Introduction

In these types of questions different characters/numbers/letters are arranged in a matrix with one term missing or characters are arranged in a wide range of geometrical figures. The characters in such arrangement follow a certain pattern and you are required to identify that pattern so that you can substitute the question mark (?) with a suitable character.

Let us see some examples to understand this concept properly.

Example-1

1.         Find the number which replaces the question mark (?).

(a) 39                            (b) 42

(c) 45                           (d) 55

(e) None of these

Answer (c) is correct.

Explanation: The number obtained by adding the numbers is written inside the figures.

13 + 12 + 9 + 1 = 35.

15 + 13 + 8 + 5 = 41.

16 + 17 + 9 + 3 = 45.

Rest of the options is incorrect because of the correctness of option (c).

2.            Find the missing number in the given number pattern below.

(a) 25                                        (b) 21

(c) 19                                        (d) 14

(e) None of these

Answer (d) is correct.

Explanation: In this pattern, the middle term is the sum of difference between the Left and Right, top and bottom numbers.

(12 - 3) + (10 - 5) = 9 + 5 = 14                                       

(15 - 5) + (17 - 8) = 10 + 9 = 19                                       

Similarly, in the third pattern the missing number is (17 - 9) + (15 - 9) = 8 + 6 = 14

Rest of the options is incorrect because of the correctness of option (d). 

3.            Find the missing number in the given number pattern below.

(a) 76                                        (b) 88

(c) 100                                      (d) 120

(e) None of these

Answer (c) is correct.

Explanation: Centre number is double the sum of numbers given in outside circles.

1 + 6 + 3 + 4 + 5 + 14 + 7 + 9 = 49 and  

Similarly: 2 + 5 + 4 + 7 + 3 + 9 + 8 + 12 = 50 and

Rest of the options is incorrect because of the correctness of option (c).

4.            Find the missing number in the given number pattern below.

(a) 9                                          (b) 10

(c) 11                                        (d) 15

(e) None of these

Answer (c) is correct.

Explanation:

Rule followed in the question

Similarly

Rest of the options is incorrect because of the correctness of option (c).

5.            In the given figure, numbers have been arranged in a certain pattern. Which number will replace the question mark (?).

(a) 1                             (b) 2                             

(c) 18                                        (d) 24

(e) None of these

Answer (d) is correct.

Explanation: The numbers that are diagonally situated are show in the pattern as follows:

Rest of the options is incorrect because of the correctness of option (d).         

Commonly Asked Question

1.          Find the missing number in the given number pattern.

(a) 15                            (b) 20

(b) 10                            (d) 8

(e) None of these

Answer (d) is correct.

Explanation: (13 + 8) - 9 = 21 - 9 = 12

(6 + 4) - 3 = 10 – 3 = 7

(11 + 5) - 8 = 16 – 8 = 8

Rest of the options is incorrect because of the correctness of option (d).

2.            Find the missing number in the given number pattern.

(a) 16                            (b) 10

(c) 8                             (d) 6

(e) None of these

Answer (d) is correct.

Explanation: In this pattern follows as:

Rest of the options is incorrect because of the correctness of option (d).

3.            Find the missing number in the given number pattern.

(a) 38                            (b) 45

(b) 58                            (d) 63

(e) None of these

Answer (d) is correct.

Explanation:

Rest of the options is incorrect because of the correctness of option (d).

4.            Find the missing number in the given number pattern.

(a) 6                                          (b) 8

(c) 10                            (d) 15

(e) None of these

Answer (b) is correct.

Explanation: Sum of numbers in each square chain is 31.

15 + 7 + 9 = 31.

7 + 8 + 16 = 31.

12 + 11 + 8 = 31.                                              

Rest of the options is incorrect because of the correctness of option (b).

5.            Find the missing number.

(a) 95                            (b) 52

(c) 48                                        (d) 38

(e) None of these

Answer (c) is correct.

Explanation: There are three parts in the figure namely I, II and III.

Number in part III is obtained by the multiplication of number in part I and part II.

Rest of the options is incorrect because of the correctness of option (c).

6.            Which number will replace the question mark?

(a) 8                             (b) 9

(c) 10                            (d) 12

(e) None of these

Answer (d) is correct.

Explanation:     .

.

Similarly.

Rest of the options is incorrect because of the correctness of option (d).

7.            Find the missing number.

(a) 8                              (b) 6

(c) 5                                          (d) 4

(e) None of these

Answer (d) is correct.

Explanation:

Similarly,

27 - 2x = 19

2x = 8

Rest of the options is incorrect because of the correctness of option (d).

8.          Find the missing number in the given number series.

(a) 25                                        (b) 26

(c) 28                                        (d) 30

(e) None of these

Answer (d) is correct.       

Explanation:     

Rest of the options is incorrect because of the correctness of option (d).