Find the squares of the following numbers: (I)425                (ii)       575                (iii)   405 (iv)205                (v)       95                  (vi)   745 (vii)125                 (viii)   995

Explanation

To find the squares of the given numbers that end with 5, we can use the formula:

If a number is of the form \( n5 \), where \( n \) is the part of the number before 5, then the square of \( n5 \) can be calculated using the formula:
\[ (n \times (n + 1)) \text{ followed by } 25 \]

Now, let's calculate the squares step by step for each number:
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