$48.95 - 32.006 = ?$

$337.62 + 8.591 + 34.4 = ?$

Which of the following statement$(s)$ is/are $TRUE$?
$I.$ $\sqrt{11}+\sqrt{7} < \sqrt{10}+\sqrt{8}$
$II.$ $\sqrt{17}+\sqrt{11} > \sqrt{15}+\sqrt{13}$

The value of $\frac{1}{2+\frac{1}{2+\frac{1}{2-\frac{1}{2}}}}$ is

The unit's digit of the number $6^{256} - 4^{256}$ is

What is the value of $\frac{2.75 \times 2.75 \times 2.75 - 2.25 \times 2.25 \times 2.25}{2.75 \times 2.75 + 2.75 \times 2.25 + 2.25 \times 2.25}$?