What Deficiency does the below rebus represent?

VIT_MIN

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

Client Dempsey living in one of the East Coast states of the U.S. was talking to Landon Donovan, who was living in the West Coast state of the U.S.

Dempsey: What time is it?
Donovan: Wow, It is the same time here.

How is this possible?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Which number comes next in the number series?

2, 9, 30, 93, ?

I am an odd number. Take away a letter and I become even. What number am I?

Find the next number in the series below

21 32 54 87 131 ?

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