Write five pairs of prime numbers below $25$ such that their sum is divisible by $10$. (One such example is $3$ and $7$,Whose sum is $10$)

$78$_____$5$ is divisible by $9$. (Write the smallest possible digit in the blank)

$416$_____$23$ is divisible by $11$. (Write the smallest possible digit in the blank)

A number that is only divisible by $3$ is also divisible by $9$.

Write true or false:

A number that is only divisible by $8$ is also divisible by $4$ and $2$.