Can you replace the question mark with the correct number?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

How is the moon similar to a dollar?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

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