Question

What is the number of principle diagonal elements in a square matrix of order n $\times$ n.

• A. n - 1
• B. n
• C. n + 1
• D. 3

Answer 1

The correct option is B

n

The principle diagonal elements are given by the elements $a_{11},a_{22},a_{33}\dots ..a_{nn}$ which are ‘n’ in number for a square matrix of order n $\times$ n.