1 EASY $$\sqrt{0}=$$

 2 EASY Simplify $$\sqrt{16x}$$.

 3 EASY A square plot of land has an area of $$144m^{2}$$. What is the length of the plot?

 4 EASY $$\sqrt{81}=$$

 5 EASY Which is not a perfect square? 012416

 6 MEDIUM $$\sqrt{225}=$$

 7 MEDIUM Which is a perfect square? 8322512415084

 8 HARD $$\sqrt{1444} \times \sqrt{1444}$$

 9 HARD $$\sqrt{361}=$$

 10 HARD Which of the following is equal to $$\sqrt{x^2}$$ $$x$$$$(\sqrt{x})^2$$$$-x$$$$|x|$$None of the above.