For each question, select the proper option from four options given, to make the statement true : (Final answer only)
The rationalising factor of $4-\sqrt{5}$ is...........
$4-\sqrt{5}$
$4+\sqrt{5}$
$\sqrt{5}-4$
$5-\sqrt{4}$
Which of the following is irrational?
Rationalise the denominator of the following:
$\frac{16}{\sqrt{41}-5}$
Simplify:
$64^{-\frac{1}{3}} + 64^{\frac{1}{3}} - 64^{\frac{2}{3}}$
Simplify:
$(\frac{1}{27})^{\frac{-2}{3}}$
Find three different irrational numbers between the rational numbers $\frac{1}{3}$ and $\frac{7}{9}$.