Which number should replace the question mark?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

Replace the question mark with the number below given a simple math problem.

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

_ _ _ IE _ _
_ _ _ IE _
_ _ IE _ _
_ _ IE _
_ _ _ _ IE

Like you see, some letters have gone missing from these words that contain the IE pair at some or the other place. The letters that will be used to fill the blanks are given below. Use them and form meaningful words. Can you do that?

A, C, D, F, H, K, L, M, N, N, O, R, R, S, S, S, T, T, Y and Y.

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Who always enjoys poor health?

I don't get anymore wetter, no matter how much rain falls on me.