What famous saying does this rebus mean?

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

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

When 99 is considered higher than 100?

What does below chemistry rebus means?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

Spot 5 differences in two Christmas tree below:

Can you identify the famous TV character from the rebus below?