What Deficiency does the below rebus represent?

VIT_MIN

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

What does this simple rebus mean?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

What number divided by 4 is the same as that number minus 4?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

What does this mean?

CCCCCCC

Move three sticks of the spiral below to form a square.

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?