Identify whether $57$ and $85$ are co-prime? Guess first and then use prime factorisation to verify your answer.

Is the first number divisible by the second? Use prime factorisation.

$225$ and $27$

Is the first number divisible by the second? Use prime factorisation.

$96$ and $24$

Is the first number divisible by the second? Use prime factorisation.

$343$ and $17$

Is the first number divisible by the second? Use prime factorisation.

$999$ and $99$