Evaluate:

$\sqrt{11236}$

Find the greatest number of five digits which is a perfect square. What is the square root of this number?

Find the least number of four digits which is a perfect square. What is the square root of this number?

Evaluate:

$\sqrt{0.2809}$

Evaluate $\sqrt{3}$ correct up to two places of decimal.

Evaluate: $\frac{\sqrt{48}}{\sqrt{243}}$