Matrices and Networks & Graphs - MCQ

The order of matrix A is

• 6

• 2 x 3

• 3 x 2

• 2, 3

• 3, 2

The element a12 is

• 3

• -5

• 1

• 8

• 2

The matrix A + B is

• 
• 
• 
• 

The matrix 2A - B is

• 
• 
• 
• 

Matrix multiplication is not defined for...

• EF

• GH

• GE

• EH

The order of matrix FG is

• 1 x 1

• 1 x 2

• 3 x 2

• 2 x 3

The inverse of matrix His

• 
• 
• 
• 

Three students were asked the number of pets they each had. The following matrix shows the number of pets owned by the three friends.

The number of pets owned by Freddy's family is

• 1

• 2

• 3

• 4

The matrix opposite shows the number of different social media applications used by three friends: Manesh (M), Nikita (N) and Paolo (P).

The total number of ways that Manesh directly connects to each of his friends is:

• 2

• 3

• 4

• 5

The matrix below shows how five people, Anna (A), Ben (B), Charis (C), Damien (D) and Emma (E), can communicate with each other. A '1' in the matrix indicates that the sender (row) can send a message directly to the receiver (column).

Damien wishes to send a message to Anna. Which one of the following shows the order through which the message could be sent?

• D-C-A

• D-E-A

• D-C-E-B-A

• D-E-B-A