Mathematics MCQs for PPSC FPSC KKPSC BPSC SPSC NTS Test 12

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There will be 25 multiple choice question in the test.
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Test Instructions:-
Test NameLecturer Mathematics
SubjectMath Test 12
Test TypeMCQs Mathematics
Total Questions25
Total Time20 Minutes
Total Marks100

You have 20 minutes to pass to the quiz.

Lecturer Mathematics Online Test No. 12

1 / 25

The set of natural number is not closed under binary operation:

2 / 25

𝑵 is closed 𝒘. 𝒓. 𝒕:

3 / 25

The set {𝟏, 𝑚, 𝑚𝟐} where 𝒊 = √−𝟏 is closed 𝒘. 𝒓. 𝒕:

4 / 25

If a matrix A has 𝒎 rows and 𝒏 columns , then order of A is :

5 / 25

A semi-group having an identity is called:

6 / 25

(𝑨𝒕)𝒕 =

A). 𝐴𝑡

B).  𝐴

C).  – 𝐴

D).  (𝐴𝑡)𝑡

7 / 25

For a square matrix 𝑨 = [𝒂𝒊𝒋]if all 𝒂𝒊𝒋 = 𝟎, 𝒊 ≠ 𝒋 and all 𝒂𝒊𝒋 = 𝒌(𝒏𝒐𝒏 − 𝒛𝒆𝒓𝒐) for 𝒊 = 𝒋 then A is called:

8 / 25

For the square matrix 𝑨 = [𝒂𝒊𝒋]𝒏×𝒏 then 𝒂𝟏𝟏, 𝒂𝟐𝟐, 𝒂𝟑𝟑…𝒂𝒏𝒏 are:

9 / 25

For every 𝒂, 𝒃 ∈ 𝑮 , 𝒂 ∗ 𝒃 = 𝒃 ∗ 𝒂 then 𝑮 is called:

10 / 25

(𝒁, . ) is

11 / 25

In group (𝒁, +) inverse of 1 is:

12 / 25

Inverse and identity of a set 𝑺 under binary operation ∗ is:

13 / 25

Solution of linear equation 𝒂𝒙 = 𝒃 is:

a). 𝑥 = 𝑏𝑎−1

b). 𝑥 = 𝑎−1𝑏

c). 𝑥 = 𝑎𝑏

d). 𝑥𝑎 = 𝑏

14 / 25

 Subtraction is non-commutative and non-associative on:

15 / 25

 The horizontal lines of numbers in a matrix are called:

16 / 25

In general matrix multiplication is not:

17 / 25

A rectangular array of numbers enclosed by a square brackets is called:

18 / 25

The set {𝟏, −𝟏, 𝒊, −𝒊} is not closed 𝒘. 𝒓. 𝒕:

19 / 25

If order of matrix 𝑨 is 𝒎 × 𝒏 and order of matrix 𝑩 is 𝒏 × 𝒑 then order of matrix 𝑨𝑩 is

20 / 25

If a matrix A has different number of rows and columns then A is called:

21 / 25

 A square matrix 𝑨 is singular if

22 / 25

[𝟏 −𝟏     𝟑     𝟒] is an example of

23 / 25

The matrix 𝑨 is said to be real if its all entries are:

24 / 25

In a group the inverse is:

25 / 25

The vertical lines of numbers in a matrix are called:

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