One number is $9$ more than the other. If their sum is $63$, what are the numbers?

Find three consecutive numbers whose sum is $108$.

[Hint. Let the consecutive numbers be $x, x+1, x+2$.]

Find two consecutive odd numbers whose sum is $56$.

[Hint. Let the consecutive odd numbers be $2x+1, 2x+3$.]

Find two consecutive even numbers whose sum is $86$.

[Hint. Let the consecutive even numbers be $2x, 2\left(x+1\right)$]