$\frac{3}{23}$ of $\frac{5}{12}$ of $1104 = ?$

$7372 \times 7372 + 7372 \times 628 = ?$

$A$ mason can build a wall in $70$ hours. After $7$ hours,he takes a break. What fraction of the wall is yet to be built?

$(\sqrt{4489}-\sqrt{2601})=(?)^{2}$

$A$ number when divided by the sum of $555$ and $445$ gives two times their difference as quotient and $30$ as the remainder. The number is

Two numbers are such that their difference,their sum,and their product are in the ratio of $1: 7: 24$. The product of the numbers is: