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Find the least number by which 45 must be divided to make it a perfect square.
Given: A number $45$.
To do: To find the least number by which $45$ must be divided to make it a perfect square.
Solution:
The least number is $5$.
As, $\frac{45}{5}=9$
And $9$ is perfect square as $\sqrt{9}=3$.
Thus, the least number is $5$ by which $45$ must be divided to make it a perfect square.
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