In which direction should the missing arrow point?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Can you find the missing piece of the Porsche?

Give it food and it will live; give it water and it will die.

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

In a local zoo, it was found that the total number of legs is 612. Also, there are equal number of each of the above animals/insects.

Can you find out how many animals are there in the zoo?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What does this mean?

CCCCCCC

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?