The following numbers are not perfect squares. Give reason. (I)1547         (ii)  45743      (iii)  8948          (iv)  333333

Explanation

To determine whether the given numbers are perfect squares, we can analyze their unit digits. A perfect square can only end with certain digits. The possible unit digits of perfect squares are 0, 1, 4, 5, 6, and 9. Therefore, if a number ends with any of the digits 2, 3, 7, or 8, it cannot be a perfect square.

Let's analyze each number step by step:

### Step 1: Analyze the unit digit of 1547
- The unit digit of 1547 is **7**.
- Since 7 is not one of the possible unit digits of perfect squares, **1547 is not a perfect square**.

...