$73 \times 18 + 486 = ? + (13)^{2}$

The last digit,that is,the digit in the unit's place of the number $[(57)^{25}-1]$ is

If the digit in the unit's place of a two-digit number is halved and the digit in the ten's place is doubled,the number thus obtained is equal to the number obtained by interchanging the digits. Which of the following is definitely true?

What is the number just more than $5000$ which is exactly divisible by $73$?

Which fraction among $\frac{3}{7}, \frac{5}{11}$,and $\frac{6}{13}$ is the largest?

The sum of $33 \%$ of a number and $14 \%$ of the same number is $3055$. What is $72 \%$ of that number?