If $\frac{1}{6.198} = 0.16134,$ then the value of $\frac{1}{0.0006198}$ is

If $\frac{\sqrt{3+x}+\sqrt{3-x}}{\sqrt{3+x}-\sqrt{3-x}}=2,$ then $x$ is equal to

If $x + (1/x) = 2$,then what is the value of $x^{21} + (1/x^{1331})$?

$\frac{1}{8}$ of $\frac{2}{3}$ of $\frac{3}{5}$ of $1715 = ?$

$4 \frac{1}{2} + 3 \frac{1}{6} + x + 2 \frac{1}{3} = 13 \frac{2}{3}$

Find the smallest fraction which when added to $\frac{2}{5} \times \frac{15}{21} \times \frac{7}{10} \times \frac{3}{8}$ gives a whole number.