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?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Solve the counting riddle by identifying the number of triangles in the given picture.

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?