What Deficiency does the below rebus represent?

VIT_MIN

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

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

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

Can you find the next number in the sequence?

113 119 101 114 116 ?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Spot what is wrong here in below Picture?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?