Question

Which is the smallest number that has to be divided to make 7623 a perfect square?

• A. 9
• B. 7
• C. 5
• D. 3

Answer 1

The correct option is B 7

$$\begin{array}{cc}3& 7623\\ 3& 2541\\ 11& 847\\ 11& 77\\ & 7\end{array}$$
$\therefore 7623=3^2\times {11}^2\times 7$
If 7623 is divided by 7, then it becomes perfect square.