Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

With the help clues provided in the image, can you find the 5 digit key?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

I have no life, but I can die. What am I?

They are three errirs in this question. Can you find them?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Solve the puzzle by telling what does below picture means.