What has 13 hearts but no other organs?

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]

What's the best place to go shopping in the ocean?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

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

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

A father's child, a mother's child, yet no one's son.

Who am I?

What is the largest number you can write with just 3 digits?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?