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

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

One of the leprechaun is missing if you see the two pictures attached to this question. Where did he go? When he comes back, do you know where has he been?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Imagine you are in a room with no windows or doors. How will you get out?

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