What does below rebus means ?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

What does the below rebus puzzle mean?

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?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

What is always in front of you but can’t be seen?

What has many teeth, but cannot bite?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?