The following numbers are obviously not perfect squares. Give reason.(i) 1057              (ii) 23453              (iii) 7928                (iv) 222222(v) 64000           (vi) 89722             (vii) 222000           (viii) 505050

Explanation

To determine why the given numbers are not perfect squares, we can analyze the last digits of each number. Perfect squares can only end with certain digits. Here’s the step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Perfect Squares**:
- Perfect squares are numbers that can be expressed as the square of an integer. The last digit of a perfect square can only be one of the following: 0, 1, 4, 5, 6, or 9.

2. **Checking Each Number**:
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