ClassNotes

Human-reviewed study resources for board exams, entry tests, and structured practice across notes, MCQs, flashcards, and past papers.

Support: [email protected]

Business: [email protected]

North America: +1 (512) 666-1423

Asia / MENA: +92 340 9170227

We typically reply within 3 business days.

Explore

Classes
Posts
MCQs
Flashcards
Search

Company

About
Contact
Tutors
Editorial Standards

Policies

Privacy Policy
Terms of Use
Cookie Policy
Refund Policy
Shipping Policy

© 2026 ClassNotes Inc. All rights reserved.

API Status: checking

Allen, Texas and Lahore, Pakistan. Public support pages are available for privacy, terms, cookies, refunds, shipping, and editorial standards.

Command Palette

Search for a command to run...

Shop
Tutors

Matrices… | NUST Entrance Test Mathematics | ClassNotes

Home
/
NUST Entrance Test
/
Mathematics
/
Matrices and Determinants

Set 9

Premium

MM

Mashaal Masha

Sep 28, 2022

On this page

$The diagonal containing the entries $a_{11},a_{22},a_{33}.....a_{mn}$ in a square root matrix $A=[a_{mn}]$ is called then$
$If $\begin{bmatrix}a+b & c+d \\c-d & a-b \end{bmatrix}=\begin{bmatrix}6 & 8 \\12 & 4 \end{bmatrix}$ then c=?$
$If $\begin{bmatrix}a & c+d \\c-d & a+b \end{bmatrix}=\begin{bmatrix}3 & 5 \\9 & 10 \end{bmatrix}$ then b=?$

Choose the correct options for the following questions.

The diagonal containing the entries $a_{11},a_{22},a_{33}.....a_{mn}$ in a square root matrix $A=[a_{mn}]$ is called then

Difficulty: Easy

A:

Identity matrix

B:

If $\begin{bmatrix}a & c+d \\c-d & a+b \end{bmatrix}=\begin{bmatrix}3 & 5 \\9 & 10 \end{bmatrix}$ then b=?

C:

Row matrix

D:

Principal diagonal

If $\begin{bmatrix}a+b & c+d \\c-d & a-b \end{bmatrix}=\begin{bmatrix}6 & 8 \\12 & 4 \end{bmatrix}$ then c=?

Difficulty: Easy

A:

5

B:

10

C:

12

D:

20

If $\begin{bmatrix}a & c+d \\c-d & a+b \end{bmatrix}=\begin{bmatrix}3 & 5 \\9 & 10 \end{bmatrix}$ then b=?

Difficulty: Easy

A:

2

B:

8

C:

13

D:

7

Premium content

Sign in and upgrade to continue reading.

Continue studying

postMatrices and Determinants - Set 1
postMatrices and Determinants - Set 2
postMatrices and Determinants - Set 3
postMatrices and Determinants - Set 4
postMatrices and Determinants - Set 5
post

Matrices and Determinants - Set 6