Find the number of digits in the square root of each of the following numbers (without any calculation).
(i) 64                  
(ii) 144                  
(iii) 4489            
(iv) 27225
(v) 390625

Explanation

To find the number of digits in the square root of each of the given numbers without performing any calculations, we can use the following rules based on the number of digits in the original number:

1. If the number of digits (n) in the original number is even, the number of digits in the square root is given by \( \frac{n}{2} \).
2. If the number of digits (n) in the original number is odd, the number of digits in the square root is given by \( \frac{n + 1}{2} \).

Now, let's apply these rules to each of the numbers provided.

### Step-by-Step Solution:
...