What famous saying does this rebus mean?

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

Move four matchsticks to the below square to form three squares?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

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

What you cannot hold but it is yours?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Find the value of "a" by solving the maths equation in the picture below: