Find five rational numbers between $\frac{2}{7}$ and $\frac{2}{5}$
Show that $0.1 \overline{6}=\frac{1}{6}$
If $\left(\frac{2}{5}\right)^{5} \times\left(\frac{25}{4}\right)^{3}=\left(\frac{5}{2}\right)^{3 x-2},$ then find $x$.
Which of the following is equal to $x$?
Find the value of $a$ :
$\frac{3-\sqrt{5}}{3+2 \sqrt{5}}=a \sqrt{5}-\frac{19}{11}$