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.
Answer of the questions will change randomly each time you start this test.
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Test Instructions:-
Test NameLecturer Mathematics
SubjectMath Test 12
Test TypeMCQs Mathematics
Total Questions25
Total Time20 Minutes
Total Marks100
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You have 20 minutes to pass to the quiz.

You have 20 minutes to pass to the quiz.


Lecturer Mathematics Online Test No. 12

1 / 25

 The horizontal lines of numbers in a matrix are called:

2 / 25

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

3 / 25

 Subtraction is non-commutative and non-associative on:

4 / 25

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

5 / 25

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

6 / 25

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

7 / 25

(𝑨𝒕)𝒕 =

A). 𝐴𝑡

B).  𝐴

C).  – 𝐴

D).  (𝐴𝑡)𝑡

8 / 25

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

9 / 25

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

10 / 25

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

11 / 25

𝑵 is closed 𝒘. 𝒓. 𝒕:

12 / 25

A semi-group having an identity is called:

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

(𝒁, . ) is

15 / 25

 A square matrix 𝑨 is singular if

16 / 25

The vertical lines of numbers in a matrix are called:

17 / 25

In general matrix multiplication is not:

18 / 25

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

19 / 25

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

20 / 25

In group (𝒁, +) inverse of 1 is:

21 / 25

[𝟏 −𝟏     𝟑     𝟒] is an example of

22 / 25

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

23 / 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:

24 / 25

In a group the inverse is:

25 / 25

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

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