What does this simple rebus mean?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

Replace the question mark with the correct number in below Picture:

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

A sundial has the fewest moving parts of any timepiece. Which has the most?

How can you tell a raw egg from a hard-boiled egg?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

What does this say?

XLR8