$92 \times 576 \div 2 \sqrt{1296} = (?)^{3} + \sqrt{49}$

The denominator of a fraction is $3$ more than the numerator. If the numerator as well as the denominator is increased by $4,$ the fraction becomes $\frac{4}{5}$. What was the original fraction?

The value of $2.1\overline{36}$ is

If a man spends $\frac{5}{6}$ part of his money and,again earns $\frac{1}{2}$ part of the remaining money,what part of his money is with him now?

What approximate value will come in place of the question mark $(?)$ in the given equation? (You are not expected to calculate the exact value)
$24.98^{2} \times \frac{16.02^{2}}{(7.98 \times 15.04)} \times 38.93 = 130 \times ?^{2}$

If $x^{2} + \frac{1}{x^{2}} = 1$,then what is the value of $x^{48} + x^{42} + x^{38} + x^{30} + x^{24} + x^{18} + x^{12} + x^{6} + 1$?