$14.28 \%$ of $49 = ?$

$A$ fraction is greater than its reciprocal by $\frac{9}{20}$. What is the fraction?

If the sum of two numbers,one of which is $\frac{2}{5}$ times the other,is $50,$ then the numbers are

$\sqrt{52 \times 27 \div 6 + 26 - 4} = ?$

In a two-digit number, if it is known that its unit's digit exceeds its ten's digit by $2$, and that the product of the given number and the sum of its digits is equal to $144$, then the number is

The quotient arising from the division of $24446$ by a certain divisor is $79$ and the remainder is $35$. What is the divisor?