Show that the following numbers are not perfect squares: (I)9327                   (ii)    4058 (iii)22453                 (iv)   7443522

Explanation

To show that the given numbers are not perfect squares, we can check the last digit of each number. Perfect squares have specific last digits, and if the last digit of a number does not match any of these, then the number cannot be a perfect square.

### Step-by-Step Solution:

1. **Identify the last digits of perfect squares from 0 to 9:**
- 0² = 0 (last digit 0)
- 1² = 1 (last digit 1)
- 2² = 4 (last digit 4)
...