The sum of squares of two positive numbers is 145. If the square root of one of the numbers is 3, then find the other number.

Find the square root of 0.000625 and express it as a fraction.

$$\sqrt{0.25} - \sqrt[3]{0.008} + \sqrt{0.36} + \sqrt[4]{0.0256}$$ = ?

​$$\sqrt{12.25} =$$​​

$$\frac{1}{9 + \sqrt{6}} + \frac{1}{9 - \sqrt{6}}$$ = ?

​$$\sqrt{2.25 × 0.01}$$ = ?

2[(620)² + (580)²] - (620 + 580)² = ?

​$$\sqrt{56.25} + \sqrt{30.25} - \sqrt{12.25} - \sqrt{20.25}$$ = ?

If $$\sqrt{506.25} = 22.5$$​, then what is the value of  $$\sqrt{0.00050625}$$​?

Simplify : $$\frac{\sqrt[3]{2744}}{\sqrt[4]{256}} \times \frac{2}{42} \times 72$$​

Find the least number that must be added to 5600 to make it a perfect square.