What does the below rebus riddle means?

Why are all black people so quick ?

What is full of holes but still holds water?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What word is pronounced the same if you take away four of its five letters?

You need to move three matchsticks to form three squares. Can you do it?

What has hands, but can’t clap?

Detective John was investigating a murder in China.
It was a difficult case, and John was completely stumped until he noticed a message sent to him by the killer cunningly hidden in a newspaper advertisement selling Car Licence Plates.
Detective John thought about it for a while, and when he had solved the puzzle, immediately arrested the guilty man.

Q1) How did John know the advert was a clue for him?

Q2) Solve the code and tell me who John arrested.

This is the newspaper advert (Car licence plates for sale) that Detective John saw.

Plates For Sale;

[W 05 NWO]
[H 13 HSR]
[O 05 EBM]
[D 08 UNE]
[U 10 HTY]
[N 04 BRE]
[N 16 TTE]
[I 26 LHC]
[T 10 AEE]
[I 26 CNA]
[X 22 VDA]