What famous saying does this rebus mean?

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

There are forty elephants and they have forty-fore heads. How can this be possible?

I am quite hot but become too cold if you remove the first two letters. What am I?

Here is a Swiss Cross. You have to make two straight cuts in the figure so that it is divided into four congruent pieces. Also, you should be able to join these pieces into a square then. Can you accept this challenge?

How is the moon similar to a dollar?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

What goes up but never comes down?