What Deficiency does the below rebus represent?

VIT_MIN

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

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

You can hear me, but you can't touch or see me.

What am I?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

I am the fastest animal but cannot climb the tree. What am I?

What do you answer even though it never asks you questions?

I have feet, but no legs. Which animal Am I?