What does this rebus means ?

PROG WORKRESS

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

Which alphabet is a part of our body?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

How many times can you subtract the number 5 from 25?

What's the only room from which no one can enter or leave

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

Can you divide the below-given shape into four equal and identical pieces?