Elementary arithmetics

In mathematics, the product of all positive integers less than or equal to a non- negative integer $n$ is denoted by $n!$. For example: $5!=5\cdot 4\cdot 3\cdot 2\cdot 1=120$. Which of the following statements is true?

The number $725233+x$ after dividing by $9$ is to give a remainder of $5$. Which of the given numbers shall we substitute for $x$?

How many odd double-digit numbers give the reminder of $2$ when divided by $9$ and are divisible by $13$ as well?

Earth weighs $5.98\cdot {10}^{24}\mathrm{kg}$, the Moon weighs $7\cdot {10}^{22}\mathrm{kg}$. Calculate in kilograms the weight of both the Moon and Earth.