What is the next number in this matchsticks series riddle?

Be active and find the killer in the picture Riddle below.

What number should come in place of the question mark below?

What Deficiency does the below rebus represent?

VIT_MIN

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

I’m tall when I’m young, and I’m short when I’m old. What am I?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

What does a man do only once in his lifetime, but women do once a year after they are 29?