Exercise

If $\sqrt{\frac{3^4+3^7}{7}}=x$, $\sqrt{\frac{3^2+3^5}{7}}=y$ and $z=\sqrt{x+y}$, then $4\left(z^2+3\right)=$

Which of the following fractions is equivalent to $2.\overline{9}\%$

If $\frac{5\sqrt{3}+\sqrt{7}}{4\sqrt{3}-2\sqrt{7}}=a+b\sqrt{21}$, then $\left(a, b\right)$ is:

Deep draws the spiral of irrational numbers below on a paper.

What is the length of $OE$ in the spiral?

Simplify: $\frac{1}{-4-\sqrt{15}}$

Find the difference between $3.47777...$and $2.85888...$

$3.\overline{4}+5.\overline{8}-7.\overline{9}$

Find the number which will replace the question mark in the given grid.