What famous saying does this rebus mean?

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

What does this rebus picture identify?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

Which is the smallest number that you can write using all the vowels exactly once?

Can you spot the man between the coffee bean in the picture below ?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Why did Buffon take the goal with him after every Juventus match?

You see me once in June, twice in November, and not at all in May. What am I?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?