Using Only Five 5's and any mathematical operator make sum as 37

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

In the image given, you can find several triangles. Can you count them all?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

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]

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

My location can be determined by the below rebus.
So where am i ?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?