Question

If A is a square matrix of order $3$ such $|A|=5$, then find the value of $|adjA|$ ?

Answer 1

Property: $|\text{adj}A|=|A{|}^{n-1}$ where $n$ is the order of the square matrix $A$.
Here, $n=3$ and $|A|=5$
Therefore, $|\text{adj}A|=5^2=25$